Answer: First trophic level
Explanation:
The autotrophs are the organisms which prepare their own food by the process of photosynthesis. The group of autotrophs includes the plants and some microbes. The trophic levels are the levels or steps in the energy pyramid which represents the increase in complexity of the organisms and the decrease in energy with the rise of the trophic level.
The autotrophs are included in the first level, as they are capable of producing their own food and exhibit highest energy in the energy pyramid. They are called as the producers.
Autotrophic organisms, which are capable of synthesizing their own food from inorganic components, occupy the first trophic level of any food chain or ecosystem.
Explanation:In any ecosystem, each step of a food chain is referred to as a trophic level. The first trophic level, also recognized as the bottom of the energy pyramid, is occupied by autotrophic organisms or producers. These organisms, examples of which include plants and other photosynthetic or chemosynthetic organisms, sustain themselves by synthesizing their own food from inorganic components. As such, autotrophic organisms form the primary energy source of the entire food chain, thus occupying the first trophic level.
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1. What problem has precession caused for many schools of astrology?
Answer:
The problem precession has caused for many schools of astrology is the marking of first day of spring in the North part of Hemisphere which was considered as zero point of the Zodiac which is approximately on March 21.
Over the past 2.5 millennia, this wobbling has moved west side along the ecliptic by 36 degrees, nearly (1/10) of the way around, nearly one whole month. So in Earlier days, those who born during the period March 21 to April 19 consider to be Aries.
Today, the sun is said to be no longer within marking point of the constellation of Aries, whereas sun is actually placed in the constellation of Pisces during the period of March 11 and April 18.
Question 14 Multiple Choice Worth 3 points) Which of the following contributes to the movement of tectonic plates? 1. deposition of sediment on the ocean floor II. push of newly formed crust III. mantle convection I only Ill only I and II ll and III I, II, and II
The push of newly formed crust and mantle convection primarily contribute to tectonic plate movement, while sediment deposition doesn't significantly influence it. The correct answer is D) II and III.
Explanation:The movement of tectonic plates is influenced by several factors. The primary driving force is mantle convection, a slow process by which heat escapes from the Earth's interior, causing an upward flow of warmer material and the slow sinking of cooler material. This convection causes the molten rocks of the asthenosphere to rise and fall, creating forces that make the tectonic plates move.
Another contributing factor is the push of newly formed crust at divergent plate boundaries. For instance, as new crust forms at the mid-ocean ridge due to causing the old crust to move aside, which induces plate movement.
However, the deposition of sediment on the ocean floor typically doesn't have a significant effect on plate movement. It can add weight to the oceanic plate, but this doesn't contribute substantially to the overall forces driving plate tectonics.
So, among the choices given, both the push of newly formed crust and mantle convection contribute to the movement of tectonic plates. Therefore, the correct option is D) II and III.
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We can determine the age of most Mesozoic rocks through "carbon dating," which relies on the radioactive decay of Carbon-14.
true or false?
Answer:
The statement is false.
Explanation:
Carbon dating using the radioactive decay of Carbon-14 is reliable up to 50,000 years. It is mostly used for living organisms that were younger than that period. Rocks are much older than 50,000 years and rocks from the Mesozoic era would not be able to be dated using Carbon-14. It will require another element with longer half-lives in order to determine ages higher than 65 million years ago.
compare and contrast organochlorine and organophosphorus
pesticides in terms of their persistence and toxicity.
Answer and Explanation:
Organochlorine :pesticides were normally utilized previously, yet many have been expelled from the market because of their well being and ecological impacts and their industriousness
For example : DDT and chlordane
Organophosphate Pesticides - These pesticides influence the sensory system by disturbing the catalyst that controls acetylcholine, a synapse. Most organophosphates are bug sprays. They were created during the mid nineteenth century, however their consequences for creepy crawlies, which are like their impacts on people, were found in 1932. Some are toxic (they were utilized in World War II as nerve specialists). Be that as it may, they as a rule are not diligent in the earth
Question 4 2 pts _is the largest solar energy collector on earth and plays a central role in stabilizing the earth's climate system. Ocean Land Vegetation Air
Answer:
Ocean is the largest solar energy collector on earth and plays a central role in stabilizing the earth's climate system
Explanation:
Ocean is the largest solar energy on the planet Earth .
Water covers more than 70 % of the planet surface , and due to its large surface spread , water absorbs heat and the temperature increases .
The ability to absorb and store large amount of energy , plays a major role in stabilizing the climate system of Earth .
Hence , the correct answer from the options given in question is - ocean .
Identify statements true of the lithosphere and asthenosphere. Choose one or more: A. The asthenosphere is relatively soft compared to the rigid lithosphere. B. The lithosphere "floats" on the asthenosphere. C. The lithosphere is denser than the asthenosphere. D. The asthenosphere underlies the lithosphere.
The lithosphere is a rigid solid composed of the crust and upper mantle, while the asthenosphere is a partially molten, flowing layer of the upper mantle.
Explanation:The lithosphere and asthenosphere are divisions based on the mechanical properties of Earth's interior.
1. The lithosphere is composed of both the crust and the upper mantle which behaves as a brittle, rigid solid. It is about 100 kilometers thick.
2. The asthenosphere is partially molten upper mantle material that behaves plastically and can flow.
Statements true of the lithosphere and asthenosphere:
A. The asthenosphere is relatively soft compared to the rigid lithosphere.
B. The lithosphere "floats" on the asthenosphere.
D. The asthenosphere underlies the lithosphere.
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Q1 Which is the best description of a climate forcing?
Something that warms the planet
Something that cools the planet
Something that creates an energy imbalance for the planet
Something that balances the energy of the planet
Answer
Something that creates an energy imbalance for the planet
Climate forming is something that can create an energy imbalance for the planet. The difference between incoming and out going radiation is called the planets radiative forcing(RP). A climate forcing factor will change the climate of the Earth.It can either cause heating of the plane , positive RF or cause cooling of the planet, negative RF.
Investigate two ways in which water shortages, erosion, water
diversion, floods or contamination of a water resource, or other
water processes have affected human history. How did humankind meet
the challenges of the impacts?
Answer:
The earth undergoes various types of geological processes that control different conditions on the earth's surface. When these processes are very severe along with human activities, then the organisms and humans have to face a lot of difficulties. Due to the occurrence of heavy flood in any region, the people lose their houses, the agricultural crop fields are affected by losing their fertility. Water is one of the essential elements for the survival of life and it creates havoc when they are contaminated because they become unfit for drinking. So a lot of problems is needed to be faced due to natural calamities like floods, tsunamis, and droughts.
Human beings can meet up the challenges of these impacts by undertaking certain steps-
(1) The waster materials produced from the industries and factories must be collected and dumped somewhere instead of allowing it to get mixed up with the rivers and streams.
(2) The dams must be properly constructed and should be periodically surveyed.
(3) Water must be preserved and make proper and minimum use of it.
(4) Pollution must be reduced as much as possible.
(5) Afforestation must be done so that the plants and trees can hold the soil and maintain its fertility, rather than getting eroded.
Which geographical feature formed the northern border of the Mauryan Empire?
A. Narmada River
B. Himalaya Mountains
C. Deccan Plateau
C. Thar Desert
Final answer:
The northern border of the Mauryan Empire was formed by the Himalayan Mountains, which served as a natural boundary and provided protection against northern invasions. The correct option is (B).
Explanation:
The northern border of the Mauryan Empire was formed by a significant geographical feature known as the Himalayan Mountains. These formidable peaks, arising from the collision of the Indian Plate with the Eurasian Plate, have played a crucial role in the physical geography and cultural history of South Asia.
The Himalayas not only provide a natural boundary between South Asia and East Asia, particularly between India and China but have also influenced the religious and cultural practices of the civilizations that flourished around them.
The Mauryan Empire, which is notable in history for its extensive reach across South Asia by 250 BCE, included the rugged terrain of the Himalayas within its northern frontier.
This inclusion of the Himalayas in its borders afforded the empire natural protection and a definitive boundary against invasion from the north. Thus, option B, the Himalaya Mountains, is the answer, as they formed the northern boundary of the Mauryan Empire.
Question 22 1 pts Which of the following represents the greatest source of domestic water usage in the U.S.? Showers Washing machines Dishwashers Toilets Faucets
Answer:
Option (4)
Explanation:
Water is the most essential element that is required by all living organism. In order to survive, water is needed. Over the years, the use of water has been increasing at a considerably higher rate. At many places, the water level has decreased. This can cause a great problem in the near future as the water on earth is depleting, either by polluting or by making excess use of it.
Currently, water is one of the major resources and one must make limited and proper use of it.
In the United States, a huge amount of water is used for domestic purpose. This includes the water that are usually used for drinking purpose, washing of dishes, toilet flushing, bathing and washing clothes, and so on.
According to the statistical record, it has been noted that in US, the maximum amount of domestic water is used in the toilets.
Thus, the correct answer is option (4).
Answer:
it is toliet
Explanation:
i just took the test
What is renewable energy? In at least 100 words, give three examples of renewable energy AND EXPLAIN how they are related to climate in terms of rainfall, air temperature, winds, and insolation.
Answer:
Answered
Explanation:
Renewable energy are those sources of energy that can be renewed in the environment. Renewable resources are in abundance in the environment. They cause little to no pollution to the environment and can be procured through right technique.
These energies include solar energy, hydel energy, tidal energy, wind energy and geothermal energy. They are related to the environment because they are procured from it. Wind energy through winds, tidal energy through tide, and geothermal energy can be obtained from the Earth heat. They are also called clean energy since they do not cause any pollution.
Select all of the correct answers: AU is:
varies dependant upon the time of year
used primary to measure things within the solar system
a measurement of distance
the distance from the center of the Sun to the center of the Earth
is the distance from the Earth to the Moon
Answer:
used primary to measure things within the solar system
a measurement of distance
the distance from the center of the Sun to the center of the Earth
Explanation:
Astronomical unit ( AU )
The value of 1 astronomical unit ( AU ) = 92,955,807 miles or 149,597,871 km , which is equivalent to about 150 million kilometres . it is the average distance between the sun and the earth .
It is used as a measurement unit , for the solar system , the AU , measures the distance , hence its units are miles , km etc .
Final answer:
An Astronomical Unit, abbreviated as AU, is the average distance from Earth to the Sun, used primarily to measure distances within the solar system, and is about 150 million kilometers. (First and fourth options)
Explanation:
An Astronomical Unit (AU) is the unit of length defined as the average distance between Earth and the Sun. This distance is about 150 million kilometers (93 million miles) or precisely 149,597,870.7 kilometers. The AU is commonly used to measure distances within the solar system, making it a fundamental concept in astronomy.
The statements regarding the AU as a measurement that varies depending upon the time of year or as being the distance from the Earth to the Moon are incorrect. While the Earth-Sun distance does vary over the course of a year due to Earth's elliptical orbit, the AU represents the average of these distances.
Moreover, the distance from Earth to the Moon is measured in Earth-Moon distances, known as lunar distances, not in AUs.
Which of the following actions best exemplifies environmental sustainability?
a. using resources to benefit future generations, even if it means lower current availability
b. using resources to satisfy current needs without compromising future availability
c. letting each country decide what is in its best interest
d. letting future generations figure out how to solve their own problems
e. increasing economic output even if it harms the environment
Answer: Option (B) is correct
Explanation:
Environmental sustainability is referred as the rates at which one can harvest renewable resource, continue creation pollution, and also concentrate on non-renewable resource depletion which can be indefinitely continued. If these are are not continued indefinitely then this means that these given resources are not considered to be sustainable.
Under this one takes care of the natural resource and look after it in order not to exhaust them.
How are changes in atmospheric CO2 over time recorded in the geologic record? List at least 4 tools/methods for reconstructing past atmospheric CO2.
Answer:
boron and carbon isotope, Phytane, Ice cores, Corals, Lake and ocean sediments etc.
Explanation:
Drillings in ice cores like within ice sheets of Greenlands, Antarctica started in 1956. Collecting core samples of 4 and a half inches and use of molecules of water O 16 and 18 that helps to determine the past atmospheric carbon. Corals, skeletal rings have bands of paleo-climatological information and as their body is made of the calcium carbonates these limes creating organisms help to determine the atmospheric concentration of carbon on prehistoric earth. The use of oxygen isotope in lakes and oceans has given data related to the content of ocean sediments, and values deposited in clay and sand. The use of phytane a diterpenoid alkane that breaks down chlorophyll is used to estimate the ancient Co2 level.The gravitational pull on the ocean at night causes the water to more or less bulge towards the moon. I wonder if out in the ocean the same thing happens but since the ocean is so vast, it isn't noticeable since it is away from the shoreline, does this occur out in the ocean as well? How does gravitational pull occur?
Answer:
Earth's rotation and gravitational attraction of the sun and the moon to some extent are responsible for the motion of tides in the oceans. As the oceans are so vast there exist a cyclic flow water.
Explanation:
As the earth has its gravity and so does the other phenomenon like stars and moon have there thought this is not felt directly as the tidal bulges that are seen around the earth occur at two times in a day and two times at evening time due to the course of earth rotation having a cyclic time of 12 hours. The gravitational pull of the moon is not that strong but since it is close to the earth's surface the tidal bulges are felt on a full moon day and a new moon day as the oceanic currents rise by the gravitational attraction of the moon at night. In the day this is noticeable, as the sun has a large attractive force on the planet derives the winds and pressure belts around the globe, When these celestial objects all fall in the same line both ends on earth experience two small and large tidal bulges on east and west sides.1.name the three types of plate boundaries(and their subtypes), and give an example where each can be found
2. what are the relations, if any, of volcanoes and earthquakes to plate bound-aries? See"plate tectonics and people" on the website
3. what type of plate boundary is found in southern California, and what is the name of the fault zone and the type of fault?
3a. Base on what you know about plate boundaries,would you expect to find volcanoes presently formin in southern california? why?
Answer:
As given below.
Explanation:
The three types of plate boundaries are Divergent, Convergent and Transform boundary. The transform boundary of the plate tectonic rift is found near the entire Californian coast. These boundaries are demarcated by shear zones, the plate tectonic boundary of divergence is found in place of the splitting of the oceanic crusts like in mid-oceanic ridges. The third boundary is of convergence in nature, which is found in most of the parts of the world like the Pacific and North America plates. If any volcanoes and earthquakes on the plate boundaries arise then they are bound to be cause and consequence of two lighter and heavier plates colliding with each other and as result, the plates burn against one another and create seismic shocks. Southern California has transform boundary and Fault is the San Andreas Fault that extends to 1,200 kilometers. The active fault with shallow earthquakes and Dextral motion. No as the shear zones do not have volcanic activities, and southern California is drifting to the western sides due to the movements along with the pacific plate.Question 9 1pts of the Earth's atmosphere is below 26km. O 50% O 100% O 48% 98%
Answer:
Earth's atmosphere is below 26 km is composed of 98%.
Explanation:
Troposepher marks the boundary for most of the convective activity to take place on the surface of the earth's this place consist of 99% of the total space for the all-weather phenomenon to occur and as a result of which is considered to a homogeneous sphere. Here the water vapor, dust particles, and other gaseous bodies are found and thus this layer is a life-supporting layer full of oxygen and hence, comprise all biotic components like the plants, animal and man. Above this layer there are drastic changes in temperature with increasing height as the atmospheric pressure at higher altitudes decreases and so does the life-supporting layer, it can be noted that the layer that protects the earth i.e ozone is found in the mesosphere at an altitude of 30 kilometers. Rest most of the weather phenomenon takes place here as it sets the stage for weather patterns as convective currents coming from the equator can't pass this layer.Why is the June solstice associated with the Southern
Hemisphere?
Answer:
June solstice marks the beginning of summer in southern hemisphere, due the earth rotational motion and reverse properties of the both hemispheres.
Explanation:
The summer solstice is associated with the midsummer, occurs when the earth poles are the maximum inclination to the sun. A within the antarctic hemisphere there is continuous daylight as the maximum axial tilt is around 23.44 degrees. Depending on the shift of the calendar days the summer solstice occurs around Dec 20 and 23rd of the year. This is due to the earth moves in an elliptical motion. In the southern hemisphere, the sun moves from East to West. It contains about 60.7% of the water on the earththe distance north and south of the equator is measured in degrees of?
Answer:
Latitudes
Explanation:
The distance traveling in the northern and the southern hemisphere from the equator is measured in terms of latitudes. It is expressed in degrees. These are the geographical coordinates that specify a particular location on earth. It ranges from 0° to 90°, where the 0° line is the equator that divides the earth into two halves. And the 90° latitude area in the polar region of both the hemisphere. The earth is bulging at the equatorial region and flattened at the poles.
The latitude plays an important role in the identification of any place on earth.
Thus, the north and south of the equator are measured in the degrees of latitudes.
Which of the following earth surface more likely have the lowest Albedo?
Question 47 options:
Grass
Ice
Forest
Concrete
Answer:
Forests
Explanation:
From all the option in the question forest ahve the least Albedo which is About 5% to 10%. Whereas all the other like grass, Ice and concreate have Albedo higher than the forest.
Albedo, the amount of the heat energy from the sun is reflected back to the atmosphere. The higher the reflection of heat higher will be the Albedo. The forest have lots of tree cover thereby it traps greater amount of heat than it reflects back and hence lower albedo.
A drainage basin bordering the sea has an area of 7500 km2 . The average precipitation for this drainage basin is 900 mm year-1 . The average surface water flow at the outlet of the drainage basin equals 22.5 × 108 m3 year-1 . The average groundwater flow to the sea is 100 mm year-1 . The averages are determined for 30 hydrological years. Determine the average actual evaporation in mm year-1 and m3 year-1.
* The average actual evaporation is **-22000 mm year-¹**. This negative value indicates that the actual evaporation is less than the precipitation and groundwater flow combined, resulting in net water accumulation within the basin.
* The average actual evaporation is **-165 million m³ year-¹**.
Here's how to determine the average actual evaporation in both mm year-¹ and m³ year-¹ for the drainage basin:
**1. Calculate the total precipitation:**
* Multiply the basin area by the average precipitation:
Total precipitation = Area * Average precipitation
Total precipitation = 7500 km² * 900 mm year⁻¹
Total precipitation = 6750000 m³ year⁻¹
**2. Calculate the total water flow:**
* Add the average surface water flow and the groundwater flow converted to m³ year⁻¹:
Total water flow = Surface water flow + Groundwater flow (converted to m³)
Total water flow = 22.5 × 10⁸ m³ year⁻¹ + (7500 km² * 100 mm year⁻¹ * 1000 m³/km²)
Total water flow = 22.5 × 10⁸ m³ year⁻¹ + 750 × 10⁶ m³ year⁻¹
Total water flow = 232.5 × 10⁸ m³ year⁻¹
**3. Calculate the actual evaporation:**
* Subtract the total water flow from the total precipitation:
Actual evaporation = Total precipitation - Total water flow
Actual evaporation = 6750000 m³ year⁻¹ - 232.5 × 10⁸ m³ year⁻¹
Actual evaporation = -165000000 m³ year⁻¹
**4. Convert actual evaporation to mm year-¹:**
* Divide the actual evaporation in m³ by the basin area and convert to mm:
Actual evaporation (mm year⁻¹) = Actual evaporation (m³) / Area
Actual evaporation (mm year⁻¹) = -165000000 m³ / 7500 km²
Actual evaporation (mm year⁻¹) = -22000 mm year⁻¹
Therefore:
* The average actual evaporation is **-22000 mm year-¹**. This negative value indicates that the actual evaporation is less than the precipitation and groundwater flow combined, resulting in net water accumulation within the basin.
* The average actual evaporation is **-165 million m³ year-¹**.
What is the correct scientific notation for 0.000002765?
Answer:
2.765*10^-6
Explanation:
Simply move the decimal place to behind the 2. The number of places it moves is the power to the base (which will be always 10). The power will also be negative because it is less than 1.
Why does the moon appear dark from space?
But why does it appear bright when observed from earth, especially when it is full moon?
moon look dark in space because the space is not a body it is a black area where there is no tress of light. Our earth is luminous body and the moon is also a luminous body that's why the earth is getting light from the sun in the day and moon in night.the answer is simple due to the movement of earth,sun and moon.
The moon appears dark from space because there is no way for light to travel and be scattered.
People on earth see the moon as bright because of the light that is scattered by the atmosphere.
While in space, it is dark because there is no way for light to travel. Since light is not scattered, the true features of the moon is seen as dark. While in space, because there is no atmosphere, it would always be dark during the day and in the night time.
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1. Using the geologic definition of mineral as your guide, determine which of the items in this list are minerals and which are not. If something in this list is not a mineral, explain. 1. Gold nugget 2. Seawater 3. Quartz 4. Cubic zirconia 5. Obsidian 6. Ruby 7. Glacial ice 8. Amber
Based on the geologic definition of a mineral, the gold nugget, quartz, obsidian, ruby, and amber are all minerals. Seawater, cubic zirconia, and glacial ice do not meet the criteria of a mineral.
Explanation:According to the geologic definition of a mineral, a mineral must meet five specific criteria: it must be naturally occurring, inorganic, solid, have a specific chemical composition, and have an ordered atomic arrangement. Based on these criteria:
Gold nugget: Yes, it meets all the criteria of a mineral. Gold is naturally occurring, inorganic, solid, has a specific chemical composition (Au), and an ordered atomic arrangement.Seawater: No, it is not a mineral. Seawater is a liquid and does not have a solid form. It also lacks an ordered atomic arrangement.Quartz: Yes, it meets all the criteria of a mineral. Quartz is naturally occurring, inorganic, solid, has a specific chemical composition (SiO2), and an ordered atomic arrangement.Cubic zirconia: No, it is not a mineral. Cubic zirconia is a synthetic material created in a lab and does not occur naturally.Obsidian: Yes, it meets all the criteria of a mineral. Obsidian is naturally occurring, inorganic, solid, has a specific chemical composition (SiO2), and an ordered atomic arrangement.Ruby: Yes, it meets all the criteria of a mineral. Ruby is naturally occurring, inorganic, solid, has a specific chemical composition (Al2O3:Cr), and an ordered atomic arrangement.Glacial ice: No, it is not a mineral. Glacial ice is a form of water in the solid state, but it does not have a specific chemical composition or an ordered atomic arrangement.Amber: Yes, it meets all the criteria of a mineral. Amber is naturally occurring, inorganic, solid, has a specific chemical composition (C10H16O), and an ordered atomic arrangement.Learn more about geologic definition of minerals here:https://brainly.com/question/32150506
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The items in the list that are minerals are: 1. Gold nugget, 3. Quartz, 4. Cubic zirconia, 5. Obsidian, and 6. Ruby. The items that are not minerals are: 2. Seawater, 7. Glacial ice, and 8. Amber.
According to the geologic definition, a mineral must meet the following criteria:
1. It must be naturally occurring, which means it cannot be man-made or produced artificially.
2. It must be inorganic, meaning it cannot be derived from living organisms.
3. It must have a definite chemical composition.
4. It must have a crystalline structure, which means its atoms must be arranged in a regular, repeating pattern.
Let's apply these criteria to each item in the list:
1. Gold nugget: It is naturally occurring, inorganic, has a definite chemical composition (Au), and a crystalline structure. Therefore, it is a mineral.
2. Seawater: Although it is naturally occurring and inorganic, it does not have a definite chemical composition, nor does it have a crystalline structure. Therefore, it is not a mineral.
3. Quartz: It is naturally occurring, inorganic, has a definite chemical composition (SiO2), and a crystalline structure. Therefore, it is a mineral.
4. Cubic zirconia: It is a synthetic material and not naturally occurring, so it does not meet the criteria to be classified as a mineral. However, if we consider naturally occurring zirconia (baddeleyite), it would be a mineral because it meets all the criteria: it is inorganic, has a definite chemical composition (ZrO2), and a crystalline structure.
5. Obsidian: It is naturally occurring, inorganic, and has a definite chemical composition similar to granite. However, obsidian is sometimes considered a mineraloid because it does not have a regular crystalline structure, but rather a glassy structure. For the purpose of this question, we will consider it a mineral because it meets most of the criteria.
6. Ruby: It is naturally occurring, inorganic, has a definite chemical composition (Al2O3 with chromium impurities), and a crystalline structure. Therefore, it is a mineral.
7. Glacial ice: It is naturally occurring, but it is not considered a mineral because it does not have a definite chemical composition (it can contain various impurities) and its structure is not crystalline but rather hexagonal.
8. Amber: It is a fossilized tree resin and is organic in nature, not inorganic. Therefore, it does not meet the criteria to be classified as a mineral.
In summary, the gold nugget, quartz, cubic zirconia (if naturally occurring), obsidian, and ruby are minerals, while seawater, glacial ice, and amber are not.
At local solar noon in the northern hemisphere, the sun is south. Which way do shadows point at noon?
Answer:
The sun tends to rise from the eastern direction always and sets in the western direction. In the northern hemisphere, during the noontime, the sun reaches the center of the horizon and is directed towards the southern side. This means that when a person faces the sun at noon, by walking directly towards it, then it will let him move in the southern direction.
Thus, If one walks with the sun at his/her back, then it means that he/she is heading towards the north. Whereas, if a one moves with the sun at his front, then this means that the person is heading towards the south. The opposite case arises in the Southern Hemisphere.
In the northern hemisphere, the shadow moves from the western to eastern direction, and it points the north direction at noon. In the southern hemisphere, the shadows indicate the south direction at noon.
Final answer:
At local solar noon in the northern hemisphere, shadows point north as the sun is positioned in the southern sky. This is the underlying principle for how sundials operate, where the shortest shadow of the day points north at noon.
Explanation:
At local solar noon in the northern hemisphere, when the sun is in the southern sky, shadows always point away from the Sun. Therefore, shadows point north at noon. This phenomenon occurs because the Sun's position in the sky is to the south, casting shadows in the opposite direction. This principle is also the basis for how sundials work, with the shadow of the gnomon indicating the time of day. During the summer solstice, for instance, the gnomon's shortest shadow at solar noon points directly north, showcasing the Sun's highest position in the sky over the course of the year.
7. Ductile fracture in a tensile-test sample is also called .
a) cup-and-cone fracture b) transgranular fracture c) intergranular fracture d) cleavage
8. Which of the following is NOT right for rare-earth metals?
a) Rare-earth metals are generally difficult to mine and process, and hence are available in small quantities.
b) Rare-earth metals are less common in earth’s crust than precious metals such as gold and platinum.
c) Rare-earth metals have unique magnetic and electrical properties, and are essential in many modern technologies.
d) The widely used rare-earth metals include yttrium, lanthanum, cerium, samarium, neodymium, etc.
Answer:
7. a) cup-and-cone fracture , all are right.
Explanation:
Ductility is the ability of the ability to undergoing significant plastic deformation before the rapture. An example of the cup and cone fracture can show this, which is a type of failure observed in ductile metals. Being subjected to uniaxial force it is essential to separate the body into pieces as the application of intense tensile stress. As ductility and malleability are all ways correlated thee material properties depend on the temperature of the metal. Rare earth metal is not commonly found in places and the chemical composition also varies as these are diverse and are used by people in everyday device some smartphones also consist of these elements.Question 21 1 pts In what year did GPS become free to the public? a) 1983 b) 1965 c) 1972 d) 1941
Answer:
1983
Explanation:
The First GPS was made available to the public this year as earlier it was under the control of the U.S military and used for strategic purposes. As they feared that giving it to the public could cause a potential loss or damage to the integrity of the country. Originally developed by the military for surveillance and monitoring program it consisted of 24 satellite systems and each satellite transmitted unique signals that were decoded to compute the precise location of satellites. GPS consists of User, Control, and User segments.Answer:
and i oop
Explanation:
Question 11(Multiple Choice Worth 3 points) If solidification ages at the Mid-Atlantic Ridge are around 10,000 years old, what does this tell you about the Mid-Atlantic Ridge? The Mid-Atlantic Ridge began to produce oceanic crust 10,000 years ago. The youngest rocks in the Mid-Atlantic Ridge solidified 10,000 years ago. The Mid-Atlantic Ridge ceased producing oceanic crust 10,000 years ago. The rocks at the Mid-Atlantic Ridge recorded the magnetic fields 10,000 years ago. The rocks adjacent to the Mid-Atlantic Ridge are older than those further away from the ridge.
Answer:
Option (2)
Explanation:
The mid-oceanic ridge is the region along which the sea floor spreading takes place. It forms a divergent plate boundary. Here, the magma forces to come out to the surface, by stretching and thinning the lithosphere. These magma as it comes out to the ocean floor along this mid-oceanic ridge, it immediately cools and form rocks that are basaltic in composition and lavas are formed. The Mid-Atlantic ridge is an example of mid-oceanic ridge.
According to the given condition, the solidification age at the Mid-Atlantic ridge is given. This indicates that the rocks that last crystallized 10,000 years ago at the Mid-Atlantic ridge are the youngest rocks.
Hence, the correct answer is option (2).
QUESTION 5 What is a Platonic Idea? A. Sensible forms within things B. An immaterial and intelligible form of sensible things C. The traditional gods that moves sensible things D. A human thought about sensible things
Answer:
B. An immaterial and intelligible form of sensible things
Explanation:
Platonic Idea -
It is given by Plato ,
He proposed this theory via the concept of eternal form , according to this theory , the immutable essence that can only be participated in the sensible things .
The idea is an invisible reality , an eternal thing , an immaterial and the prototype of the reality .
A Platonic Idea refers to an eternal, immaterial form of sensible objects, as conceptualized by the Greek philosopher Plato. These forms stand in contrast to the physical, changeable realm and are considered the true essence of things. Plato believed that understanding these forms is the key to wisdom, justice, and courage.
Explanation:A Platonic Idea, according to the Greek philosopher Plato, is an immaterial and intelligible form of sensible things, which gives them their identity. These forms critically differ from the ever-changing realm as the forms exist eternally in the invisible realm that Plato conceived. They shape our perception of reality, but are not subject to the change and decay that physical objects experience.
In contrast, Aristotle's philosophy focused more on the four causes, the material basis of things, instead of the immaterial forms. This material basis includes matter, form, agent of change, and the aim or purpose of things.
Plato further argued that virtue and understanding are derived from accessing the realm of the forms. That is why he proposed the idea of philosopher-kings who have the deepest understanding of the forms.
Learn more about Platonic Idea here:https://brainly.com/question/14905467
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"Man has too long forgotten that the earth was given to him for usufruct alone, not for consumption, still less for profligate waste." What does Marsh mean? (About 100 – 200 words). Word limit is a general guideline.
This question is from the global environment by thomas easton from the man and nature . prompt
Answer:
The marshes are defined as the type of wetland where the water covers the ground surface for a long period of time. Here, the trees are absent and are mostly dominated by the grasses and other small herbivore plants. They are commonly formed in delta type of environment where the rivers adds water into the seas. It forms an isolated and distinct ecosystem.
The marshes in nature, behaves like a filtration process as the vegetation that are present in marshes takes up more amount of nutrients for their growth and expansion. But, if it does not use up these excess nutrients then it cause water pollution comprising of nitrogen and phosphorous.
They also plays an important role in the reduction of damages that are caused by a flood.
The marshes are sometimes seasonal and it occurs when the height of the river level is relatively high, and it floods the grassland areas.
The marshes are of three types-
(1) Tidal salt marshes
(2) Tidal freshwater marshes
(3) Inland freshwater marshes.