Across
- 3. heat transfer in liquids and gases where warmer material rises and cooler material sinks.
- 5. Water travels to the atmosphere through____.
- 9. Chemicals added to the air, one form is smog.
- 11. cycle the chemical cycle where nitrogen goes through many forms in nature.
- 12. The process of research that a scientist goes through
- 13. Pathways used for the specific identification of something.
- 15. The circulation of rocks through earth.
Down
- 1. A natural substance like fossil fuels that cannot be replenished.
- 2. The state where a population size is stable; birth and death rates are balanced
- 4. The study of organisms and their environment.
- 6. Organisms that make their own food/energy.
- 7. the ability to meet needs today without running out of resources.
- 8. energy from the sun is converted into different usable forms of energy.
- 10. cycle The continuous circulation of water in earth's atmosphere.
- 14. The capacity for doing work. It can be used in many different forms.