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JulijaS [17]
4 years ago
15

Why is expansion of rock important for magma to form?

Geography
1 answer:
Eddi Din [679]4 years ago
8 0
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the
in-situ
) temperature, then melting will occur and in this case magma will form.
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In 10 minutes a heart can beat 700 times. At this rate, in how many minutes will a heartbeat 140 times? At what rate can a heart
Ivanshal [37]
Answer:

Heart will beat 140 times in 2 minutes.
Heart beats at a rate of 70 beats per minute.

Explanation:

In 0 minutes heart beats 700 times

hence in 1 minute it will beat <span><span>70010</span>=70</span> times

and heart will beat 140 times in <span><span>14070</span>=2</span> minutes

4 0
3 years ago
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Answer:

c.The atmosphere, a plant, a herbivore, a decomposer, then back to the atmosphere.

Explanation:

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A single carbon atom would more likely go from the atmosphere through being absorbed by a plant and, later, it would enter into the organism of a herbivore that eats the plant. After the herbivore dies, the carbon atom would enter into the organism of a decomposer that would expel it back again into the atmosphere.

8 0
3 years ago
How does the ocean floor close to the center slit differ from the ocean floor near
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3 0
3 years ago
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The correct answer is - B. convection currents in Earth's mantle.

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The pressure from the convection currents is so high that it actually manages to move the plates in certain direction, making them collide/subduct, slide past one another, or move away from one another, shaping up the physical geography of our planet.

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3 years ago
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ikadub [295]
Arabian Peninsula is the answer. Option C.
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3 years ago
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