Match the following. Match the items in the left column to the items in the right column.

1. ammonification
the study of the universe beyond the earth
2. assimilation
process of heat transfer by the circulation or movement of a gas, liquid, or plastic material
3. asthenosphere
process by which plants or animals convert nutrients into usable organic compounds, such as proteins
4. astronomy
the layer immediately surrounding the lower mantle; composed of molten rock
5. atmosphere
theory proposed by Alfred Wegener that the continents once formed a single supercontinent that broke up and drifted apart
6. biosphere
the living organisms of Earth
7. continental crust
the gaseous layer of a planet, usually retained by its gravity
8. continental drift
process by which certain bacteria convert organic nitrogen into ammonia and ammonium salts during decomposition
9. convection
area where tectonic plates meet and push against each other
10. convergent boundary
the part of Earth's crust that forms landmasses