Across
- 4. A group of two or more atoms bonded together.
- 6. The process of a solid turning into a liquid.
- 9. The external form or outline of an object.
- 11. The process of a liquid turning into a gas.
- 12. To move back and forth quickly and rapidly.
- 15. To press or squeeze something to make it smaller.
- 17. The process of a liquid turning into a solid.
- 19. The state of matter that has a definite volume but takes the shape of its container.
- 20. Relating to or resulting from motion.
Down
- 1. The smallest unit of a chemical element.
- 2. The force exerted on a surface.
- 3. The state of matter that has a definite shape and volume.
- 5. The action or process of moving.
- 6. Anything that has mass and takes up space.
- 7. The state of matter that has no definite shape or volume.
- 8. A tiny piece of matter.
- 10. The ability to do work or cause change.
- 13. A measure of how hot or cold something is.
- 14. The amount of space an object occupies.
- 16. The process of a gas turning into a liquid.
- 17. To move or travel steadily and continuously in a current or stream.
- 18. To increase in size or volume.