Across
- 3. unit for electricity
- 10. injection for prevention
- 11. green plant
- 12. works against gravity
- 13. needs medium to travel
- 15. unit for force
- 16. needs host to live on
Down
- 1. is basic building unit of life
- 2. world largest mammal
- 4. 3rd planet from the sun
- 5. combination of oxygen and hydrogen
- 6. needed for respiration
- 7. worlds largest amphibian
- 8. can travel in vacuum
- 9. studies of living things
- 14. holds the blueprint of cell