A) Correct
b) Incorrect
c) Incorrect
d) Correct, but not the best answer
The answer is B. Russia's fertile soil is extremely depleted from constant use.
Answer:
False
Explanation:
The rich, black topsoil found in the Northern European plain is known as Chernozem.
It is usually rich in humus and found in temperate regions of Russia and Ukraine predominantly.
- A permafrost is a permanently frozen soil.
- Such a soil has remained under sub zero temperature for a very long period of time.
- This kind of soil creates a tundra.
- It usually not cultivated and rarely supports plant growth.
Chernozem is a very rich soil that supports a wide range of agricultural products.
Answer:
e. is produced by the absorption of UV radiation.
Explanation:
The thermosphere is a layer of Earth's atmosphere which is directly above the mesosphere and below the exosphere. It extends from about 85 to 500 km altitude above the earth.
In the thermosphere, the temperature is strongly dependent on the level of solar activity. When the Sun is very active and emitting more high energy radiation, the thermosphere becomes hotter by X-ray and UV radiation absorption.
Answer:
Over thousands of years a river's flowing water erodes or wears down rocks and soil to create a valley. The largest and most popular canyons have had slit through dry areas by swift streams sustained by rain or melting snow from wetter areas.
