Across
- 2. Gallus gallus domesticus
- 3. 4th state of matter
- 4. study of animals
- 7. anything that has mass and volume
- 9. largest external organ of human body
Down
- 1. biggest planet
- 2. made up of two or more elements
- 5. force that attracts objects toward the ground
- 6. central command of human body
- 8. smallest particle that made up matter