Rock records are not an evidence of pre-existing lives.
The flora and fauna constitute the living species of all the plant and animals including the humans. The animal and plant that might have existed long ago can never physically leave evidence in the form of fresh leaves and flesh.
The fossil of the animals and humans and other life forms gives us a clear evidence of what kind of life existed in the years preceding us.
Hence, the correct answer is option B that is fossils.
why do sandy beaches from at many sea shores
What has MOST LIKELY caused a change in the soil in the wheat field shown? A) crystallization B) erosion C) sedimentation D) weathering
Erosion, i took the test
Which of the following describes a negative affect that global warming could have on plant life on Earth?
I. Increased levels of CO2 that are associated with global warming will allow plants to perform photosynthesis more efficiently. II. Global warming may cause drought conditions in some areas, which would limit the amount of water available to plants in those areas. III. Global warming may cause severe flooding in some areas, which could inhibit photosynthesis if a plant's leaves and stems are submerged. IV. Global warming can cause an increase in the growing season of plants, allowing them to reproduce more often.
Answer:
II. Global warming may cause drought conditions in some areas, which would limit the amount of water available to plants in those areas.
III. Global warming may cause severe flooding in some areas, which could inhibit photosynthesis if a plant's leaves and stems are submerged.
Explanation:
Global warming is one of the effects of climate change. It is simply the warming of the surface of the earth as result of increase in temperature on the earth surface.
Global warming results from increase in levels of greenhouse gases in the earth's atmosphere. These gases prevents radiation from leaving the earth surface thereby leading to increase in temperature. The more the gases, the more the spike in temperature.
This increase in temperature can lead to drought.
As the earth also warms, polar ice can melt which can increase the level of water in the world's oceans and then flooding of coastal areas.
Explanation - Global warming is an increase in the surface air temperature of the Earth. Human activities such as the burning of fossil fuels are contributing to a current episode of global warming. Many scientists predict that current global warming will cause an increase in extreme weather conditions, such as flooding and drought.
Drought conditions limit the amount of water available to plants. Plants cannot live without sufficient water. On the other hand, too much water can cause excessive flooding, which can inhibit photosynthesis in plants if a plant's leaves and stems are submerged.
Increasing CO2 levels and increasing growing seasons are both positive effects that global warming could have on plant life on Earth.
Why are people against saving the ozone layer?
51.8 g of magnesium sulfate heptahydrate is heated in an oven until all the water is driven off. What is the mass of the anhydrous compound?.
The mass of the anhydrous compound is -655.29 g.
Explanation:To determine the mass of the anhydrous compound, we first need to calculate the mass of the water that is driven off during heating. The molar mass of water is 18.015 g/mol, so the mass of the water is 51.8 g * (7 * 18.015 g/mol) = 707.09 g. Subtracting this from the initial mass of the compound gives us the mass of the anhydrous compound: 51.8 g - 707.09 g = -655.29 g.
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Which of the following sequences correctly displays the energy transformation from the inside of a battery to the igniter inside a car's engine? A. Heat Energy Electrical Energy Chemical Energy B. Electrical Energy Chemical Energy Heat Energy C. Chemical Energy Electrical Energy Heat Energy D. Chemical Energy Mechanical Energy Heat Energy
its Chemical Energy, Electrical Energy, Heat Energy. i just had this one.
How would you best describe the texture of an igneous rock that formed extremely slowly underground
Answer;
Pegmatitic
Explanation;
-The texture of igneous rocks can be analyzed by geologists to understand the manner in which the rock became solid or crystallized from liquid, or how it is a melted rock. A pegmatitic texture is one in which the mineral grains are exceptionally large.
-Igneous rocks may be identified by determining their composition and texture. Once the two characteristics have been identified, the Igneous Rock Identification chart is used to identify the name of the rock.
Compare and contrast global winds and local winds
Answer:
LOCAL WINDS: Include sea breezes, blow over short distance, include land breezes
GLOBAL WINDS: Blow over a long distance, curve due to the Coriolis effect, flow from poles to the equator
Explanation:Explanation:
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Localized winds are those that cover a small area. Local geography, such as being close to an ocean, has an impact on them.
What defines Localized winds?
Local winds are those that only cover a small region. Between tiny low and high pressure systems, local winds blow.
They are impacted by the topography of the area. Local winds can be influenced by proximity to an ocean, lake, or mountain range.
Along with monsoons, they also contain land and ocean breezes. Around the world, belts of global winds are present.
Thus, Localized winds are those that cover a small area. Local geography, such as being close to an ocean, has an impact on them.
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Which of the following situations is accurate regarding the transfer of heat? Thermal energy from the refrigerator is transferred to a hot pie.
An ice cube loses heat to a warm glass of water.
A warm cup of tea transfers heat to cold hands.
An open door on a freezer cools a warm room.
Final answer:
In the given situations, the accurate statement regarding the transfer of heat is: An ice cube loses heat to a warm glass of water.
Explanation:
Heat is the transfer of energy from an object with a higher temperature to an object with a lower temperature. In the given situations, the accurate statement regarding the transfer of heat is:
An ice cube loses heat to a warm glass of water.
When the ice cube comes into contact with the warm glass of water, heat energy is transferred from the water molecules in the ice cube to the water molecules in the glass, causing the ice cube to melt.
Can nonsmokers hold their breath longer than people who smoke? Write the independent variable, the dependent variable, and the hypothesis.
Examples of things we wish we could cure
List four ways you can avoid injury while using HCl and three steps you would take in case of an accidental exposure to HCl need the answer asap
Answer:
Explanation: Four ways you can avoid injury while using HCl -
a) It's concentrated form is highly toxic so better use in the experiment hood.
b) Don't inhale its fumes.
c) Use lab coat while performing experiments.
d) Protect your eyes by wearing eye glare.
Three steps you would take in case of an accidental exposure to HCl -
a) Inform the lab assistant and teachers regarding the mishap.
b) Don't try to use any kind of ointment or medicated thing on the affected area without any medical advice.
c) You can use sodium bicarbonate to neutralize it.
Which type of clouds are tall and very dark on the bottom;usually gray black
Options:
1.)Cirrus
2.)Stratus
3.)Cumulus
4.)Cumulonimbus
From which sphere does most water evaporate
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P = ? in kPa
V= 0.602 L
n = 0.00801 mol
T = 311 K
R = 8.314 L-kPa/mol-K
Use numbers as written to calculate. Round to nearest hundredth.
compare chemical weathering to mechanical weathering
Chemical weathering and mechanical weathering are two types of weathering processes that break down rocks through different mechanisms. Chemical weathering involves chemical reactions, while mechanical weathering involves physical forces. Both types of weathering can occur simultaneously and work together.
Explanation:Chemical weathering and mechanical weathering are two types of weathering processes that break down rocks, but they involve different mechanisms. Chemical weathering occurs when rocks are broken down through chemical reactions, such as oxidation or dissolution. Mechanical weathering, on the other hand, involves physical forces, such as ice wedging, abrasion, or root growth, that break rocks into smaller pieces.
An example of chemical weathering is the rusting of iron, where iron reacts with oxygen in the presence of moisture to form iron oxide. An example of mechanical weathering is the freeze-thaw cycle, where water seeps into cracks in rocks, freezes, expands, and causes the rocks to break apart.
Both types of weathering can occur simultaneously and contribute to the overall weathering process. They can also work together, as in the case of tree roots growing into cracks in rocks and exerting physical force while also releasing acids that chemically break down the rocks.
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A plant grows toward the light because ________ in the plant cause some cells to grow longer than others.
What kind of boundary is shown in the image below?
Just did this
the answer is divergent.
just got done doing this haha its divergent
What is the difference between rotation and revolution?
Ca3(PO4)2 + 3 SiO2 + 5 C → 3 CaSiO3 + 5 CO + 2 P
Given the balanced reaction above, what mass (in grams) of phosphorus is produced if 36 g C react?
Final answer:
To find the mass of phosphorus produced, we calculate the moles of carbon from the given mass, then use the balanced reaction to find the ratio of carbon to phosphorus, which allows us to calculate the moles and consequently the mass of phosphorus. The mass of phosphorus produced is approximately 37.164 grams.
Explanation:
Calculating the Mass of Phosphorus Produced
To calculate the mass of phosphorus produced when 36 g of C react in the given balanced reaction, we first need to find out how many moles of C this mass corresponds to. Carbon has an atomic mass of approximately 12.01 g/mol. Using this, we calculate the moles of C by dividing the given mass by the molar mass of carbon:
moles of C = 36 g / 12.01 g/mol = 2.998 moles of C (approximately 3 moles)
Next, from the balanced reaction equation, we see that 5 moles of C produce 2 moles of P. So, for 3 moles of C, we use a simple ratio to find the moles of P produced:
3 moles C : x moles P = 5 moles C : 2 moles P
We can cross-multiply and solve for x to find the moles of P:
x = (3 moles C × 2 moles P) / 5 moles C = 1.2 moles P
Phosphorus has an atomic mass of approximately 30.97 g/mol. Now we convert the moles of phosphorus to grams:
mass of P = 1.2 moles P × 30.97 g/mol = 37.164 g
Therefore, the mass of phosphorus produced is approximately 37.164 grams.
Which of the following changes the solid Earth the most?
If a mass that weighs 8 kg is held at a height of 10 m, what is its potential energy?
The potential energy of an 8 kg mass held at a height of 10 meters is 784 joules, calculated using the formula for gravitational potential energy: PE = m * g * h.
Explanation:The question is related to the concept of Gravitational Potential Energy in physics. The formula to calculate the potential energy, PE, of an object is PE = m * g * h, where m represents the mass, g the acceleration due to gravity, and h the height of the object above ground level.
Given that the mass is 8 kg and the height is 10 m, the potential energy is calculated by inserting these values into the formula. Given that the acceleration due to gravity on Earth is roughly 9.8 m/s², we find the potential energy PE = 8 kg * 9.8 m/s² * 10 m.
Therefore, the potential energy of this 8 kg mass held at a height of 10 m is 784 joules.
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Would you classify silicone as a element or compound
The main difference between the internal combustion engine and the Diesel engine is that the Diesel engine
The main difference between the internal combustion engine and the diesel engine is that the diesel engine is that air that it has is being compressed in the beginning and the fuel is later injected after the air has been compressed. Whereas the internal combustion engine generates its power by having fuel to be burn in which the air is compiled with the engine in which the gas that became hot is used to drive to do their particular work as it started to expand.
The primary difference between gasoline and Diesel engines is the fuel ignition method. Gasoline engines use a spark plug, while Diesel engines use hot compressed air. Diesel engines are more efficient, longer-lasting but also heavier and more expensive.
The main difference between an internal combustion engine and a Diesel engine lies in the method of igniting the fuel. In gasoline engines, a spark plug ignites the fuel-air mixture when the piston reaches the top of the cylinder. In contrast, Diesel engines do not use spark plugs. Instead, they rely on the heat generated by the compression of air in the cylinder to ignite the fuel. The Diesel cycle involves admitting only air into the cylinder, compressing it adiabatically to very high pressures, and then injecting the fuel into the now-hot air for ignition.
Due to their different ignition mechanisms, Diesel engines tend to be more efficient and durable. They can operate at higher thermal efficiencies, allowing for more miles per gallon in vehicle applications. The ability to use a variety of fuels, including biodiesel, also makes Diesel engines versatile in terms of energy sources.
Bella notices when she looks through a magnifying glass objects appear to be larger. A magnifying glass is used to magnify, or makes objects look larger. It uses a special lens mounted in a frame and usually has a handle. What type of lens does a magnifying glass have?
convex
prism
reflecting
concave
Which statement about trade during the period of the Roman Empire is correct? A. Trade supplied Romans with exotic goods and helped spread new ideas. B. Trade was confined to food staples transported over short distances. C. Most of the empire's outlying territories refused to trade with Rome. D. A lack of paved, well-maintained overland routes hampered Roman trade.
Option A i.e Trade supplied Romans with exotic goods and helped spread new ideas is the correct answer.
The Roman Empire was the center of trade between the East and the West. Besides trade of goods, the trade helped Spread new ideas and culture of East and the West in the Rome. So Trade routes were dissemination of new ideas and culture in the past.
Which of the following was not included in the bill of rights
Answer:
voting rights
Explanation:
There is nothing specifically written in the Bill of Rights regarding voting rights.
How are fossil fuels used in the harvesting of fresh apples from an apple tree?
A. Fossil fuels power the rainwater used by the tree.
B. Fossil fuels power the ripening of the apples.
C. Fossil fuels power the person picking up apples from the ground.
D. Fossil fuels power the machine that shakes the tree so that the apples to the ground.
Answer: The correct answer is : D. Fossil fuels power the machine that shakes the tree so that the apples to the ground.
Explanation: The use of fossil fuels has been incorporated into food production since 1950 in the form of kinetic energy, pesticides, and other products used in production. Fossil fuels are non-renewable materials such as petroleum (oil and gas) and coal.
What causes an element from the periodic table to be more or less reactive?
Is air pressure greater at the equator than at the north pole?