Across
- 4. layer of Earth under both the atmosphere and oceans; composed of the core, mantle, and crust
- 5. the thin, rocky outer layer of Earth
- 6. the gaseous portion of a planet
- 8. any size group of interacting parts that form a complex whole
- 9. all life on Earth; the parts of the solid Earth, hydrosphere, and atmosphere in which living organisms can be found
- 10. the 2890-kilometer-thick layer of Earth located below the crust
- 12. the innermost layer of Earth located beneath the mantle; divided into inner and outer
Down
- 1. the theory that proposes that the universe originated as a single mass which then exploded
- 2. the distance east or west of the prime meridian; measured in degrees
- 3. the water portion of Earth
- 7. tectonics the theory that proposes that Earth's outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself
- 11. the distance north or south of the equator; measured in degrees