Across
- 1. – Organic compound with enzymes and muscles
- 7. – Type of cycle recycling matter
- 8. – Reaction that breaks down molecules
- 10. – Water vapor becomes liquid
- 11. – Acid-base indicator color for acids
- 13. – Gas released during respiration
- 14. – Movement of rock or soil by water or wind
- 15. – All water on Earth
- 16. – Scientific investigation process
- 17. – Type of fuel made from ancient life
- 19. – Substance with pH below 7
- 21. – Algae bloom from too much nutrient
- 24. – Type of reaction involving bonding
- 25. – Capacity to do work
- 27. – Ultimate source of energy on Earth
- 28. – Stored form of energy
- 29. – Element essential to all living things
Down
- 2. – Element needed for proteins
- 3. – Element in DNA and bones
- 4. – Plants use sunlight to make food
- 5. – Layer of gases surrounding Earth
- 6. – Universal solvent, essential to life
- 9. – Outer layer of solid Earth
- 12. – Study of organisms and environment
- 13. – Sugars and starches (energy source)
- 18. – A group of tissues working together
- 20. – Energy that travels as waves
- 22. – Type of energy from heat
- 23. – Starting substance in chemical reactions
- 26. – Energy-carrying molecule of cells