Across
- 2. Far past Neptune with icy objects
- 6. One parent, identical copy of itself
- 7. Ice and dust, tail glows when near the sun
- 8. A complete living thing
- 10. Provides support, protection, and structure
- 11. Produces offspring
- 12. Small rocks burning in Earth's atmosphere
- 14. Has cell walls and makes their own food
- 15. A diagram that shows how energy flows through an ecosystem
- 16. Center of our solar system
- 18. Basic unit of life
- 19. Harmful substance in an environment
Down
- 1. Water found in lakes and body's of water
- 3. Two parents combine to create genetic material
- 4. Water drains to body's of water
- 5. Decomposes matter, recycles nutrients
- 6. Small rocky, irregular shaped objects
- 9. Water stored underground
- 13. Giant spherical shell surrounding the sun
- 17. Rocky sometimes icy and smaller than planets