Across
- 3. Volcanic eruptions rock formations and plate tectonics are examples of this.
- 6. Forms of matter are passed from one one organism to another, one biosphere to another.
- 8. Water in the sky forms into clouds.
- 10. What eats plants for nitrogen source.
- 12. Essential for life makes important chemicals such as DNA
- 13. Element that is in each of the cycles
- 14. Plants use this to make sugar and oxygen.
- 16. Something that is made by man that adds phosphorus to water.
- 17. Phosphorus is limited in this kind of water.
- 18. activity Mining and burning of fossil fuels clearing of land and use of fertilizers.
- 20. fuels Decayed plants and animals create...
Down
- 1. Activities performed by living organisms
- 2. Limited in oceans.
- 4. Effect on atmosphere caused by too much CO2.
- 5. Nitrogen ___ in oceans
- 7. Formation of clouds lightning and flow of water are effects of this.
- 9. Chemical substances that an organism needs to sustain life.
- 11. Rain fall to the ground.
- 15. Water goes to the sky.
- 19. rain Caused by humans type harmful to plants and animals