Across
- 2. a type of weather with heavy rain, thunder, and lightning
- 4. a measure of how hot or cold something is
- 5. the study of rocks and Earth’s crust
- 8. a group of stars that form a pattern in the sky
- 9. the natural home or environment of a plant or animal
- 11. a small, round object that orbits a planet
- 13. the colored part of the eye that helps us see
- 14. the study of living things
- 16. the largest organ of the human body
Down
- 1. the process of plants making their own food using sunlight
- 3. the process of a liquid turning into a gas
- 6. a device that uses electricity to produce light
- 7. a shiny, yellow metal that is very valuable and used in jewelry
- 8. a natural resource that can be burned for heat and energy
- 10. the basic building blocks of matter
- 12. the force that pulls objects toward the center of the Earth
- 15. a substance that is neither a solid nor a liquid, such as air