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8_murik_8 [283]
3 years ago
7

In the Earth's mantle, heat is transferred in large convection currents. Within these currents,

Biology
2 answers:
Mama L [17]3 years ago
8 0

The answer is D hotter rock rises

Why? Because... While convection is generally discussed as a form of heat flow within liquids and gases, it can occur in solids too. For example, the temperature and pressure conditions in the Earth's mantle allow mantle rock to flow very slowly. Hotter rock gradually rises up and cooler rock gradually sinks down in large convection currents in the mantle.

And because study island....

yarga [219]3 years ago
3 0

Answer:

D. hotter rock rises and cooler rock sinks.

Explanation:

We know that as we move <u>towards Earth's center</u>, the <u>temperature rises</u>. This rise in temperature causes rocks to melt (magma). The high temperature and melting of rocks <u>decrease the density of material </u>which makes it <u>move upward</u>. By <u>moving upward</u>, the molten rock <u>starts turning solid</u> and becomes <u>denser again</u>. Here, it <u>sinks back due to gravity</u>. This upward and downward movement of rocks due to density and temperature makes a convection cell.

PS: The formation of convection cells in Earth's interior is also the reason for plate tectonics.

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Ivanshal [37]

Answer:

Tigers are often poached for their parts, used in traditional __chinese_____ medicine.

Explanation:

Traditional Chinese medicine for over a thousand years has used the strength of the tiger to cure various physical and spiritual ailments. For this they need parts of the tiger such as their eyes, bones, teeth etc.

Below are some of the ailments treated:

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4 0
3 years ago
Which ecosystem is more healthy, tundra, grassland, or desert? why?
Kamila [148]

Answer:

Grassland

Explanation:

Healthy grasslands are important habitats for birds and other wildlife, and also places where we farm and ranch. They provide food, cover, space and safe access to water for both wildlife and livestock.

4 0
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Explanation:

6 0
3 years ago
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Answer:

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8 0
3 years ago
A researcher places dogs in a cage with metal bars on the floor. the dogs are randomly given electric shocks and can do nothing
kifflom [539]

The answer choices to this question are:

<span>a.       </span>Learned helplessness.

<span>b.      </span>Stimulus discrimination. 

<span>c.       </span>Aversive conditioning. 

<span>d.      </span>Vicarious learning.

The best answer choice is:

<span>a. </span>Learned helplessness

<span>Explanation: Learned helplessness was studied by Seligman as a potential animal model of depression. Learned helplessness occurs when people or animals feel helpless to avoid negative situations. Martin Seligman first observed learned helplessness when he was doing experiments on dogs. He noticed that the dogs didn't try to escape the shocks if they had been conditioned to believe that they couldn't escape.</span>

4 0
3 years ago
Read 2 more answers
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