Across
- 2. This word means the total amount of matter stays the same before and after a change.
- 5. When a liquid becomes a solid, it is __________.
- 7. When a solid turns directly into a gas, skipping the liquid stage (like dry ice), it is called __________.
- 10. When water vapor cools and becomes liquid again, it is __________.
- 11. The space an object takes up is its __________.
- 12. When you mix baking soda and vinegar, bubbles form because of this invisible type of matter.
Down
- 1. When matter changes from solid to liquid, it is __________.
- 3. Matter cannot be created or __________, only changed.
- 4. A change that forms new substances, such as rust or burning, is a __________ change.
- 6. When matter seems to disappear, it has often turned into this (think steam or smoke).
- 8. Matter that cannot enter or leave a system is in a __________ system.
- 9. The amount of matter in an object is its __________.