Earth in the Solar System

1. hot, liquid rock
5. the process by which organisms make food using energy from the sun the carbon dioxide
6. magma that flows to Earth's surface
8. the measure of the force with which the gases in the atmosphere push on a surface
12. the layer of gases in the upper atmosphere that blocks most of the sun's ultraviolet radiation from reaching Earth
13. the movement of air caused by differences in air pressure
14. Earth's middle layer found between the crust and the core
15. the ratio of a substance's mass to its volume
17. the spin of an object such as Earth on its axis
18. the thin, outermost layer of Earth

2. the mixture of gases that surrounds Earth
3. a large circular pattern in which air travels
4. a large body of air where the temperature and moisture content are similar throughout
7. the central part of the Earth
9. the cloud of gases and dust particles that formed our solar system
10. an object in space that continues to grow to form a planet
11. the are where two air masses meet
16. the force of attraction between two objects because of their masses