<u>Convection</u> causes hot air to rise when hot and cold air meet.
I hope that helps :)
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Further into convection:
https://www.ck12.org/physics/convection/lesson/Convection-MS-PS/
Answer:
7. B. the variety of species on Earth
8. D. invasive (exotic)
Explanation:
Hope this helps my friend!!
Meteoroid - the tail of a shooting star
Meteor - a shooting star
Meteorite - a shooting star when it has landed on the surface of a planet or moon.
So the answer is B: Meteor, meteoroid and meteorite
Hope it helped!