Across
- 3. a system of words, letters, or other symbols that stand for other words, letters, or symbols
- 5. someone who comes up with something new, often an object or a way of doing something
- 7. how high or how low a sound is when you hear it
- 9. a device that shows wave patterns
- 10. a form of energy, such as what usually powers light bulbs
- 12. a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
- 14. vibrations that you can usually hear with your ears
- 16. the gases that surround the Earth
- 17. the way sounds travel in an up-and-down pattern
- 19. to take a code and change it to a different form that can be understood
- 20. to move from one place to another
- 22. an empty space without any air
- 23. the distance between two points of a wave
Down
- 1. a sound that bounces off a surface and travels back to someone's ears
- 2. a measure of how many waves go by you in a set amount of time
- 4. a person who uses science to come up with solutions to problems
- 6. something that happens again and again and again in a way that can be predicted
- 8. how loud a sound is
- 11. to exchange information
- 13. the height of a wave
- 15. a quick movement back and forth
- 18. a part of the ear that vibrates to help us hear sounds
- 21. a test used to discover new information about a question