Two questions which arises in my mind about aurora borealis are:
- Why does aurora borealis occur?
- Why does aurora borealis occur in a particular time of the year?
Answers:
- As solar wind approaches the Earth, it meets the Earth's magnetic field. In the ionosphere, the ions of the solar wind collide with atoms of oxygen and nitrogen from the Earth's atmosphere. The energy released during these collisions causes aurora borealis.
- Aurora borealis is active the whole year. Since it needs to be dark in order to see aurora borealis in the sky, late August/September through the very beginning of April is the best time to go to a destination located in the aurora zone for a chance to see them.
Note: These are the questions which arises in my mind only. It may differ from person to person.
Hope you could understand.
If you have any query, feel free to ask.
It is limited becuase of their amount of arable land
The change to an ecosystem that is brought about by the biotic factors is the the landslide caused by the cattle overgrazing. The answer is letter C. The word biotic means the factor should be living thing (s). Among the choices, only the cattle is living organism.
Answer:
Rotation
Explanation:
Rotation- means that it goes around, like the Earth around the sun.
C. Noth Korea. This country is still a Communist and have a lot of problems in the country.
