Across
- 2. a set of events that repeats in the same order over and over
- 4. the fresh water beneath Earth's surface
- 9. to heat a liquid until it bubbles and turns quickly into a gas
- 10. an overflow of water
- 14. water falling from clouds in the sky; including rain, snow, and hail
- 16. something that limits what you can do
- 17. the height of something
- 19. the process of a liquid changing to a gas
- 20. a type of windstorm that starts as a smaller storm over the ocean
- 21. a barrier built to prevent an overflow of water from a river
Down
- 1. all the water (solid, liquid, gas) on and around planet Earth
- 3. a test used to discover new information about a question
- 5. a person who uses science to come up with solutions to problems
- 6. a special kind of mixture where you cannot tell the different parts from each other
- 7. the gases that surround a planet
- 8. a habitat where the land is covered by shallow water, such as a swamp
- 9. the amount of money you have to spend on something
- 11. a combination of two or more things
- 12. the process of a gas changing to a liquid
- 13. a barrier built to prevent an overflow of water from a large body of water, like the ocean
- 14. to guess what will happen based on things you know
- 15. a large area of salt water that covers the Earth
- 18. a large area of fresh water beneath Earth's surface