Across
- 1. Has a trunk
- 3. The study of living organisms.
- 5. Man's best friend
- 8. Systematic knowledge of the physical or material world.
- 11. An electronic device for storing and processing data.
- 12. A scientific procedure to test a hypothesis.
- 16. Large marsupial
- 18. A global computer network.
- 19. Gas essential for respiration.
- 20. Likes to chase mice
Down
- 2. Process by which plants make food using sunlight.
- 4. A biological community of interacting organisms.
- 6. The rules of language structure.
- 7. Convert waste into reusable material.
- 9. A form of energy from charged particles.
- 10. The study of past events.
- 13. A large celestial body orbiting a star.
- 14. A mountain with molten lava inside.
- 15. Flying mammal
- 17. A branch of mathematics dealing with symbols.