Across
- 1. The natural satellite of the earth
- 4. The smallest unit of life
- 5. The natural phenomenon that causes lightning and thunder
- 6. The state of matter that has no fixed shape or volume
- 7. The substance that covers about 71% of the earth’s surface
- 9. The process by which plants make their own food
- 11. The change of state from liquid to gas
Down
- 1. The name of our galaxy
- 2. The organ that pumps blood throughout the body
- 3. The measure of the amount of matter in an object
- 6. The force that attracts a body toward the center of the earth
- 8. The branch of science that studies living organisms
- 10. The unit of force in the SI system