Answer:
Your answer is they are produced by P and S waves.
Explanation:
These waves are known as primary and secondary waves. When these two waves have passed through the earthly body, the next wave that follows is the surface wave. They move slower than body waves and they are also more destructive because they are larger. Hope this helped :)
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:
its the first option.
Explanation:
We have not much idea of what Dark Energy is. It is believed to be the force that is behind the expansion of the universe.
The element with the greatest number of valence electrons available for bonding is chlorine. Among all the choices, chlorine is the element that belongs to the higher group number, group 7. Selenium is from group 6. Boron is from group 5, while calcium is from 2. Since the group number also equates to the number of valence electrons, chlorine is the answer.
