When charged particles from the sun strike atoms in earth's atmosphere, it causes electrons to move to a higher energy state. When the electrons drop back to a low energy state they release light photons. That is what causes an aurora!
Hope this helped!
(-:
Any photos below 7 is known as acidic, the lower the pH the more acidic the solution I believe.
I think c is the answer not sure though
The effect of a neurotransmitter is based on the properties of the receptor more than the neurotransmitter.
Answer:The ocean is constantly in motion, moving water from place to place via currents. The Gulf Stream brings warm water from the Gulf of Mexico all the way up to the Norwegian Sea. As the warm water comes in, colder, denser water sinks and begins moving south—eventually flowing along the bottom of the ocean all the way to Antarctica.
Explanation:
hope this helps :)
