Answer:
D
Explanation:
Answer:
d
Explanation:
Two tectonic plates are diverging along a Mid-Oceanic Ridge. Which of the following features would NOT be found along that type of plate boundary?
a. Shallow earthquakes
b. Strong, deep earthquakes
c. Rifting and Normal Faulting
d. Symmetrical "stripes" of positive and negative magnetism parallel to the ridge
e. New crust being created directly from the mantle
f. Transform boundaries perpendicular to the ridge
g. Fissure volcanoes
Answer:
In a Mid-Ocean Ridge we are not going to find Strong, deep earthquakes
Explanation:
A Mid-Ocean Ridge is produced by divergence between plates, what generates a rift zone with normal faults; this kind of faluts are the result of tensional stress, that makes blocks to fall. When blocks are falling, they can produce some shallow earthquakes.
As plates are separating, there is growing a space between them and this allows magma to arrive to the surface, creating fissure volcanoes that are being part of the new crust that is being created. When rocks get cold, their magnetic minerals get oriented to the magnetic north, for that reason, as magma (next rocks) is being desposited at both sides of the ridge, we can find symmetrical stripes of positive and negative magnetism parallel to the ridge.
When ridges break up because of stress differences in the different segmentes, transform boundaries appear to conect all the ridge. On transform boundaries the displacement is horizontal, for that reason the are perpendicular to the divergent boundaries.
The Strong and deep earthquakes are not going to find under Mid-Ocean Ridge.
What is a Mid-Oceanic Ridge?A mid-ocean ridge refers to a seafloor mountain system which is constituted by plate tectonics.
It has an extent of about 2,600 meters and arises about 2,000 meters preceding the deepest percentage of an ocean basin. This dimension is where seafloor dispersive takes place along a different plate boundary.
It is created by separation between plates, which creates an opening zone with average faults. This kind of faults are the outcome of tension stress, that makes blocks to fall. They can produce some shallow earthquakes, when blocks are gone down,
There is growing a space between them and this allows magma to arrive to the surface, As plates are separating. And creates fissure volcanoes that are being portion of the new layer that is being created.
When rocks get cold, we find symmetrical stripes of positive and negative attraction parallel to the ridge and New crust being created directly from the mantle.
Therefore, option A is correct.
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7. What is the angle between the ecliptic and celestial equator? Why is that important?
Answer:
The ecliptic plane is inclined at 23.5° with respect to the celestial equator because of the tilt of the Earth's rotation axis with respect to the plane of its orbit around the sun.
The angle between the ecliptic and celestial equator is known as the obliquity of the ecliptic.
Why is the angle between the ecliptic and celestial equator important?The angle between the ecliptic and celestial equator, known as the obliquity of the ecliptic which is approximately 23.5 degrees. This angle plays a crucial role in determining the changing seasons on Earth.
The Earth's axis is tilted relative to its orbital plane around the Sun causing the Sun's position in the sky to vary throughout the year. This tilt is responsible for the different lengths of daylight and varying intensity of sunlight that lead to the four distinct seasons.
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Question 10 1pts Gravitational pull that causes things to turn right in the Northern Hemisphere; is known as the Air Pollution Coriolis Effect Conveyor Belt Jet Stream
Answer:
Gravitational pull that causes things to turn right in the Northern Hemisphere is known as Coriolis Effect
Explanation:
The spinning of the earth around the sun its planetary orbit causes the seasons day and night and temperature reversals. Tilt in the earth of 23.5 is mainly due to the earth is a geoid and the elliptical shape of the planet causes it to have 365 days around one year. Coriolis force is a force created due to the rotation of the earth and northern winds are deflected towards the right side and winds coming from the equator in the southern hemisphere to the left side of the globe. The winds are thus being called as planetary winds and westerlies and easterlies are found in this equatorial belts of mid-latitudes. This force is the largest force created by the gravitational pull of earth with an average rotational speed of 460 meters per second.what is the azimuth of the sun at sunrise on the Vernal Equinox? At what other day during the year is the azimuth of the sun the same at sunrise?
Answer:
March equinox is day during the year when all the daylight of the sun is asme at sunrise and sunset.
Explanation:
Equinox is the time when the plane of the earth passes through the centre of the sun. Occurring around 23 March and 23 Sept. The vernal equinox is also called as the spring equinox. The azimuth of the sun is the angle of the sun's position defined by the relative direction along the horizon. However the most commonly followed convection for analyzing the sun radiation is 90 degrees east, south 180 degrees and west is 270 degrees. As sunrise and sunset are defined by the upper limb of the solar disk. These conditions produce patterns of night and day as the sun appears to move just above the horizon at an angle of 0.39 degrees per day as the equinox passes.Light travels at 3 x 105 km/s (300,000 km or 186,000 miles). How long will it take to get to earth? (A distance of 1.5 x 108 km)
0.2 s
0.8 s
8 s
8 minutes
Answer:
Option (4)
Explanation:
Here, Speed of light= [tex]3\times10^5[/tex] Km/sec
Distance= [tex]1.5\times10^8[/tex] Km
We know that,
[tex]Speed=\frac{Distance}{Time}[/tex]
[tex]\implies Time=\frac{Distance}{Speed}[/tex]
[tex]Time=\frac{1.5\times10^8}{3\times 10^5}[/tex]
[tex]=0.5 \times10^3[/tex]
=500 sec
=8 minutes 20 sec
Hence, the correct answer is option (4) i.e 8 minutes.
Why are nighttime mixing ratios of ozone always nonzero in the background troposphere (think of rural areas) but sometimes zero in urban areas?
Answer:
The newly transmitted toxins blend with different poisons, including ozone, present in foundation air, and a confounded procedure of synthetic responses and nonstop weakening happens.
Introduction to ozone instigates impacts on well being and the earth, causing respiratory challenges in touchy individuals and conceivable harm to vegetation and biological systems.
Night time mixing ratios are always nonzero in the background troposphere but sometimes zero in urban areas.
Photo chemical pollution is formed from emissions of nitrogen oxides [tex](NO_x, where NO_x = NO + NO_2)[/tex] and of volatile organic compounds (VOCs) and carbon monoxide (CO) in the presence of sunlight.
Final answer:
At night, the background troposphere maintains nonzero ozone levels due to consistent low-level production and fewer pollutants that destroy ozone, whereas urban areas may have zero ozone levels at times because nighttime reactions can consume ozone without the presence of sunlight to produce more.
Explanation:
The presence of nighttime mixing ratios of ozone being nonzero in rural areas but sometimes zero in urban areas is due to differences in ozone production and destruction processes. In the background troposphere, ozone is produced by the interaction of sunlight with oxygen molecules and various pollutants such as volatile organic compounds (VOCs) and nitrogen oxides (NOx) which are less prevalent in rural areas. This results in a constant, albeit low, level of ozone at night.
In contrast, urban areas have higher concentrations of these pollutants due to more motor vehicle exhaust, industrial emissions, and higher energy consumption leading to more intense photochemical reactions. This can lead to higher daytime ozone levels. However, at night, the lack of sunlight halts the production of ozone, and urban areas may have more substances that react with and consume ozone, such as nitric oxide (NO), which can lead to occasionally zero ozone levels at night. The nocturnal ozone levels in urban areas can be more variable due to these factors.
explain how you could use a graduated cylinder and a gram
balance to determine the density of water in g/ ml, calculate the
density of water.
Explanation:
From the question , we are given a graduated cylinder and a gram balance ,
Graduated Cylinder -
The purpose of a graduated cylinder is to determine the volume of any liquid .
The graduated cylinder have the marks for the amount of liquid filled in it , Hence , the volume of the water can be determined , by filling the water and observing the reading .
To calculate the mass of water , first the empty cylinder is weighed and then water is added and again weighed , now the difference will give the mass of the water ,
Now to calculate the value of density ,
Density of a substance is given by the mass of the substance divided by the volume of the substance .
Hence , d = m / V
V = volume
m = mass ,
d = density ,
Hence , by putting the values for the mass and volume , density is calculated from the above formula .
To determine the density of water using a graduated cylinder and a gram balance, measure the mass of a known volume of water and calculate the density by dividing the mass by the volume.
Explanation:To determine the density of water using a graduated cylinder and a gram balance, you would first measure the mass of a known volume of water using the gram balance. Then, you would measure the volume of the water by pouring it into the graduated cylinder and reading the volume markings. Finally, you would calculate the density of water by dividing the mass by the volume.
For example, if you measured a mass of 100 grams and a volume of 100 milliliters, you would divide 100 grams by 100 milliliters to get a density of 1 gram per milliliter.
Question 2 Multiple Choice Worth 1 points) Which of the following is an example of how a water system is contaminated by non-point source pollution? Hikers toss food packaging into a mountain stream. Chemicals from batteries in a landfill leach into the groundwater supply. Several inches of acid rain fall over a lake. An oil pipeline bursts along the ocean floor. Fertilizers applied to a crop field run off the soil and into a river.
Answer:
One example of how a water system is contaminated by non-point source pollution is Several inches of acid rain fall over a lake.
Explanation:
Examples of non-point source pollution are mostly associated to rainfall or even snow melt. All the other alternatives in this question are examples of point source pollution. They all come from direct sources. The rainfall, however, is a diffuse form of pollution since it is spread throughout the lake.
What is the relationship between heat production and resistance as related to electricity?
Answer:
Heat produced is directly proportional to resistance
Explanation:
Heat produced is directly related to the resistance if resistance will be more then heat production will also be more
The heat in produced is given by [tex]H=i^2RT[/tex], here i is current, Ris resistance and T is temperature.
From the relation we can see that heat is directly proportional to resistance so if we increase the resistance then heat produced also increase and if decrease the resistance heat produced decreases.
What form of indoor air pollution is the result of naturally occurring radioactive decay?
Answer:
Radon in door source of air pollution.
Explanation:
From all Pollutant and sources found in the interior of the homes like the pet dander and molds, pesticides and asbestos. Radon a chemical element found in homes having an atomic number of 86. It is a radioactive and odorless tasteless natural gas. Through the radon is non-reactive elements, it can be oxidized with compounds of fluoride. It has no stable isotopes characterized bt unstable mass. In the mining industry, it caused due to the exposure from the released air. Radium-226 is used to produce the radon which is found in uranium ores and phosphate rocks. An estimate of about 2.4 billion curies of radon is released every year into the soil. This pollutant can also be found in water bodies and even in construction sites.What is the difference in electronegativity between chemical bonds in diamond(C)? Are these bonds ionic or covalent?
Answer:
Diamond have C-C bonds, so we do not expect difference in electronegativity since only are C atoms. In diamond the bonds are covalent as is expected for bonds between atoms with small difference in electronegativity (<1.7).
Question 5: For a planet in an elliptical orbit to "sweep out equal areas in equal amounts of it", it must... a) move slowest when near the Sun. b) move fastest when near the Sun. c) move at the same speed at all times. d) have a perfectly circular orbit.
Answer:
Option (B)
Explanation:
According to the Kepler's 2nd law regarding the planetary motion, as the planets moves in an elliptical path, orbiting around the sun, and the line joining both the sun and planet forms an equal amount of area in equal amount of time. This equal area in equal time is maintained by the faster speed of the planet near the sun (Perihelion) and slower speed of the planet at a distance away from the sun (Aphelion).
Thus, the correct answer is option (B).
The correct answer is (b) the planet must move fastest when it is near the Sun, as described by Kepler's equal-area law, which is part of his laws of planetary motion.
For a planet in an elliptical orbit to "sweep out equal areas in equal amounts of time," it must move fastest when near the Sun. This is known as Kepler's equal-area law, which is one of the laws that describe planetary motion. According to this law, the line connecting a planet to the Sun sweeps out equal areas during equal intervals of time, meaning that the planet travels faster when it is closer to the Sun in its elliptical orbit. This occurs because the gravitational pull is stronger when the planet is closer to the Sun, which accelerates the planet and increases its orbital speed. Therefore, the correct answer to the question is: b) move fastest when near the Sun.
Question 2(Multiple Choice Worth 3 points) Which of the following is most dense? asthenosphere continental crust core O mantle oceanic crust
Answer:
Mantle oceanic crust
Explanation:
The Asthenosphere consists of heavier elements like aluminum, magnesium basaltic rocks and made up of old oceanic plates. This liquid layer is based on deformation properties. Which are later characterized by Isostatic adjustment? Due to high temperature and pressure conditions in this layer the rock is in the molten state. Plates above move in n ductile manner as the oceanic crust has a density of 3.0 g/cm cube, and that of continental crust is about 2.83 g/cm cube. Thus lighter plates or continents can move on this layer as they are less dense and hence they, later on, move back into the same oceanic trenches through the process of subduction.3a.What are the rules of the Coriolis Effect?
b.Be able to indicate the direction that wind will move in the upper and lower atmosphere, in the northern and southern hemisphere, around high and low pressure systems.
Answer:
(A) The Coriolis force is the force that acts on an object due to the rotation of the earth. The basic rule of this force is that it causes the deflection of wind when it blows from one place to another. The magnitude of this Coriolis force directly depends upon the latitude at which the object is located. This force is maximum at the poles and minimum at the equator.
(B)- Correct answer is Option (2) i.e this force can indicate the wind direction in the northern and southern hemisphere,
When the air in a particular area becomes warm due to heating, then it becomes less dense and rises up. This area forms a low pressure zone. This low pressure zone is filled with the air from the high pressure zone. The wind that blows from the region of high pressure to the region of low pressure does not move in a straight line. Due to the Coriolis force, this wind gets deviate and reaches the low pressure zone.
Thus, this force indicates the direction from which a wind blows in both the southern and the northern hemisphere. In the southern direction it moves in anticlockwise direction, whereas in the northern hemisphere it moves in clockwise direction.
Question 20 Is Pluto more similar to the terrestrial planets or to these moons?
Answer:
Pluto is more to the terrestrial planet as it has a rocky core and not a gas ball like the sun.
Explanation:
Pluto is more like Europa, a satellite of Jupiter, as these terrestrial planets have several satellites pluto also has five satellites biggest of them is Charon. Unlike the other giant spheres, pluto is a dwarf planet. Like earth, pluto also has natural greenhouse gas methane. Also like terrestrial planets, pluto has an orbital period is about 248 years. Like other planets, pluto has an axial tilt of 120 degrees. Creatures can be found on the surface some are volcanic and others are tectonic being induced by the internal heat. Its core like the earth is made up of rocky mass surrounded by the mantel.What is meant by the half-life of an unstable element?
Answer:
Half-life is defined as the time required by an unstable element to reduce half of its original value. All unstable elements have a decay rate and this half-life differs from element to element. These unstable elements are known as radioactive elements. It continuously decays until it becomes a stable one. These elements when decays release radiations which are harmful to lives.
This half-life plays an important role in the determination of the age of a rock or fossils. It is used in various types of radiometric dating methods.
For example, the half-life of Carbon-14 is approximately 5700 years and the half-life of Uranium-238 is 4.5 billion years.
How is pollution related to sustainability? Sustainability must incorporate ways of halting pollution entirely Sustainability incorporates methods of decreasing pollution. Sustainability needs to find a way to increase pollution. Sustainability uses the energy of pollution to drive the economy Sustainability and pollution will both increase in the future.
Answer:
Sustainability must incorporate ways of halting pollution entirely
Explanation:
The concept of sustainability in the production process means that an economic activity is performed without causing further damage to the environment. For example, for a paper mill it consumes 100 trees in the production process. To be considered sustainable, this firm must generate the benefit that these trees brought to the environment. This can be done in many ways, such as planting trees or directing funds to environmental causes. In other words, an economic activity is considered sustainable if it generates benefits to the same extent as the harm caused by its activity. If the company has polluted the environment, it must take steps to reverse the pollution it causes to be sustainable.
What causes the seasons? Explain. Be as precise and accurate as possible.
Answer:
Rotation of the earth on its axis.
Explanation:
The earth is tilted at 23.5 degrees relative to its ecliptic plane and rotates in an anticlockwise direction around the sun this causes the winds in the earth to move from left to right in the northern hemisphere and in right to left in southern hemisphere knowns the Coriolis effect. The impact of sun rays creates a system n the earth's landscape that makes the earth produce temperature inversions and relative earth has three pressure cells that move in a cyclic order from the equator to the poles. It is also due to the angle of inclination around the sun that the earth experience cold and warm weather in summers as a result of the tilt the sun rays fall directly 90 degrees on the equator and are inclined toward the poles at the angle of 30 degrees. Also, the presence of upper air jet streams and geostrophic winds influence the temperature ranges o the earth they bing in the warm and cold air masses from the other regions and equator being a region of mixing diverts all of these winds hence creating a good balance.which of the following characteristics suggests that an Air Mass is "mP"?
Source region is the Arctic basin and Greenland ice cap
Associated with Occasional periods of clear, cool weather in summer
Associated with low clouds and showers in winter
Unstable in winter; stable in summer
Warm and humid entire year
Answer:
Maritime Polar air masses are cool, moist, unstable thus found over Arctic basin and greenland ice caps.
Explanation:
Air mass is the volume of air defined by temperature and water vapor. Covering hundred and thousands of miles. Cooler are being found over the arctic. They move southwards along the Rockies into the plains then eastwards. These air masses collect warm and mist winds, originating in north Atlantic. The center of the air mass has high pressure and surrounded by lower air pressure at higher latitudes. Antarctica and arctic circle are dominated by such air massesAn 'mP' or maritime Polar air mass comes from the Arctic basin and Greenland ice cap. It brings clear, cool weather in summer and includes low clouds and showers in winter. It's usually unstable in winter but stable in summer.
Explanation:The characteristics that suggest an Air Mass is 'mP' or maritime Polar include the source region being the Arctic basin and Greenland ice cap. It is also associated with occasional periods of clear, cool weather in the summer and low clouds and showers in winter. Maritime Polar air masses are generally unstable in winter and stable in the summer. However, they are not typically warm and humid the entire year.
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A common radio wavelength observed coming from astronomical objects is 21 cm. what temperature is associated with this radiation? 1st attempt See Hint Feedback 13.8
Final answer:
The 21 cm line in radio astronomy is significant for studying hydrogen in space; it has a wavenumber of about 4.76 m-1, an ordinary frequency of approximately 1.43 GHz, and an angular frequency around 8.98 × 10^9 rad/s. Long wavelengths are often emitted by cold, extended objects such as gas clouds, whereas short wavelengths are indicative of hot, energetic environments.
Explanation:
The 21 cm line is an important radio wave in radio astronomy, originating from the transition between the hyperfine levels of the ground state in neutral hydrogen. This specific wavelength allows astronomers to measure the galaxy's structure and motion. To calculate the wavenumber, you divide 1 by the wavelength in meters, which for 21 cm (0.21 m) gives us a wavenumber of approximately 4.76 m-1.
To find the ordinary frequency, you divide the speed of light by the wavelength in meters: frequency = c / λ = (3 × [tex]10^{8}[/tex]m/s) / (0.21 m) ≈ 1.43 GHz. The angular frequency is given by 2π times the ordinary frequency, which is about 8.98 × 109 rad/s.
Objects emitting radiation at very long wavelengths, like the 21 cm line, are typically large, cold structures such as gas clouds, while short wavelength radiation can be associated with very hot, energetic events like supernovae or accretion disks around black holes.
Which of the following radiations has the shortest wavelength?
Question 36 options:
X-rays
Near Infrared
Visible light
Ultraviolet
Answer:
X-rays
Explanation:
X-rays are a higher frequency than the other three. A higher frequency has a shorter wavelength.
All of the following are base units of the SI system except:
kilogram
kelvin
meter
pound
liter
Answer:
pound
liter
Explanation:
The SI system is the system of measurement that is the most widely used around the world. It is actually the modern day version of the metric system. The majority of the countries in the world use this measuring system, but there are few that don't, such as the United States, Liberia, and Myanmar (Burma). Canada and the United Kingdom are kind off in an in between situation, as they have this system as official, but the population still very often uses other measurements that are tradition, often leading to confusion.
This measuring system has seven base unites:
second (s) - measures time
meter (m) - measures length
kilogram (kg) - measures mass
ampere (A) - measures electric current
kelvin (K) - measures temperature
mole (mol) - measures amount of substance
candela (cd) - measures luminous intensity
Explain the positive and negative effects of globalization on environment?
Answer:
Various positive and negative elements of globalization on environment
Explanation:
Globalization is explained as the progress of going global in terms of technology and culture, the connection of global networks with trade, capital flows and the spread of technology. The positive effects include several factors like the development of resources, development of trade and standards so that the environment laws can be established. Cheaper consumer goodsNegative aspects are
Lower environmental standardsTrade And export of valuable stuff lead to the creation of strict competition, as a result, the quality of the natural environment degrades.
Overexploitation of natural resources.The given opportunities to produce the more natural resources are exploited and their growth gets hampered.
What are the major controlling factors for the variations of the water mass in the ocean?
Answer:
Rising and falling of tides, Winds and thermohaline circulation in oceans.
Explanation:
As oceanic mass is always defined as a body of water which has commonly formed with the chemical and physical properties. Like temperature salinity and common water mass in the world are Atlantic bottoms, Deepwater basins. Depth of the oceanic water can be measured through the salinity or dissolved salt content in water, this affects the amount of freshwater in oceans. Deeper zones of water bodies are found near the trenches and valley bottoms. Winds are responsible for raising and falling of tidal waters in oceans and movement of currents produced in water masses affects the direction and flow of water bodies. Winds have a direct impact on the ocean warm water upwelling and other factors being the flow of debris etc.Question 14 Where (in relation to the Sun) are the four least dense planets? a) Farthest from the Sun b) Nearest to the Sun c) Distance from the Sun is not related to density d) Distance and density are in exact agreement
Answer:
d) Distance and density are in exact agreement
Explanation:
Distance From the sun is related to the density of the planets as most of the terrestrial planet have rocky cores and are made up of solid metals so, the density remains stable as the case of the earth having a density of 5.5g/cm cube. Planets near to the sun like the mercury have a density of 5.4g/cm cube and planets away from the sun like Saturn have a density of 1.2g/cm cube and Jupiter has 1.3g/cm cube. Thus it can be estimated that the nearness to the sun impacts the amount of the gases and gravity the planets can absorb. Four least dense planets are Saturn, Uranus, and Neptune, and Jupiter the farther we go density decreases as these planets tend to made entirely on gas and condensed icy crystals. As the solars winds blow away the gases from terrestrial planetsthe majority of the east coast of the United States has this certain soil classification.
Vertisols
Entisols
Alfisols
Spodosols
Ultisols
Answer:
Ultisols
Explanation:
They are commonly known as red clay soils being acidic, these soil sare founding tropics, and subtropics. Lacking in calcium, magnesium, and potassium. they are produced due to weathering and are found 8% worldwide. They may be purplish red, brownish pale yellowish-orange. Having a pH of more than 5. The red and yellow color results from the iron oxides. They consist of 45% mineral and 5% organic matter. To avoid the decay of matter adding manure to the fall is advisable with a significance of 2 to 3 thick layer as they are easily exhausted. Contain more calcium carbonate.Answer:
the answer to this question is E ( Ultisols
Explanation:
Motion of light at the constant speed of light tells us:
Different colors of light travel at different constant speeds.
Light moves instantly from all objects to Earth.
We see distant objects as they were long ago.
Light causes many optical illusions
Answer:
Different colors of light travel at different constant speeds.
Explanation:
The white light is composed of of different colors , i.e. , VIBGYOR , Violet , indigo , blue , green , yellow , orange , red .
When the white light is dispersed into different colors of VIBGYOR , all color bend by different velocities , and speed of the light is independent of time .
Hence , from the given options , the correct answer for eh motion of light , is , the Different colors of light travel at different constant speeds .
What is the drag force, buoyancy force, and gravitation force on a grain in motion?
Answer:
Drag Force - A drag force is a force of friction caused by a body's movement through fluid like water, air etc.
Buoyancy force - Buoyancy or upthrust force is an upward directed force imposed by a fluid opposing an object's weight
Gravitation force - Gravitational force is a force of attraction that draws mass from any object.
Explanation:
Drag Force - A drag force is a force of friction caused by a body's movement through fluid like water, air etc. Drag force functions contrary to direction of the current flow speed
Buoyancy force - Buoyancy or upthrust force is an upward directed force imposed by a fluid opposing an object's weight. Due to weight of the fluid, pressure rises with depth in a section of fluid.
Gravitation force - Gravitational force is a force of attraction that draws mass from any object.
Who did not step in the moon in the mission of Apollo 11?
Answer:
Michael Collins
Explanation:
Among the three astronauts that went in the Appolo 11 mission to moon. Two of them landed their foot on the moon surface while one of them remained in the lander. His name was Michael Collins.
Michael Collins was command module pilot. While Neil Armstrong and Buzz Aldrin were the other two. Neil Armstrong Was the first to land his foot on the lunar surface.
Question 13(Multiple Choice Worth 3 points) Which of the following does not accompany volcanic activity in the Pacific Northwest? slab pull subduction ocean ridge mountain building convergent boundary
Ocean ridge does not accompany volcanic activity in the Pacific Northwest.
Explanation:
In this process the denser oceanic plate force the thinner continental plate to sink into the mantle. This region is referred as subduction zone, where it results in intense volcanic eruptions and earthquakes.
The denser Pacific plate sinks because of the chunk pull impact and it likewise prompts the development of mountains. This sort of impact creates profound center seismic tremors.
It isn't related with the maritime edge as the mid-maritime edge shapes in a disparate plate limit. In the Pacific Northwest , the volcanic activity is carried out by the geological process majorly by subduction.