Across
- 4. The outermost layer of the atmosphere
- 8. This rock is rich in granite and makes up most of the continental crust
- 9. The most abundant gas in the atmosphere
- 10. This gas makes up about 21% of the atmosphere
- 13. River environment formed where fresh and salt water meet
- 14. The layer of Earth’s atmosphere closest to the surface
- 16. The type of rock formed from layers of sediment
- 18. Minerals formed from intense heat and pressures
- 21. The hardest mineral on the Mohs scale
- 24. Type of cloud that brings thunderstorms
- 26. Layer of Earth that contains peridotite and lies below the crust
- 28. An instrument to measure earthquake vibrations
- 29. A water-rich layer in Earth’s cryosphere
Down
- 1. Theory that proposes the solar system formed from a molecular cloud
- 2. Sandy soils need frequent application of this
- 3. A theory stating that the Earth is the center of the universe
- 5. A person who studies minerals
- 6. A naturally occurring, inorganic solid with a crystalline structure
- 7. Protective gas layer found in the stratosphere
- 11. The process of rock breakdown due to weather
- 12. This mineral property refers to the way it reflects light
- 15. A volcanic rock that cools quickly on Earth’s surface
- 17. Water stored beneath Earth’s surface
- 19. This rock type forms from magma cooling inside Earth
- 20. A component of soil that comes from decomposed plants and animals
- 22. The scale used to measure mineral hardness
- 23. The innermost layer of the Earth composed mainly of iron and nickel
- 25. The theory that suggests the universe began with a massive explosion
- 27. The visible part of the electromagnetic spectrum that makes the sky blue