Across
- 2. the cycle including the most abundant element in the air
- 7. when the outputs of a cycle are used as the imputs similar to the water cycle
- 8. the measurement of how much carbon people have used
- 11. the cycle including rocks getting taken into the water and new rocks being made from silt
- 12. the change of weather and temperature over the years because of human activity
- 13. the food plants create when photosynthesising
- 16. a membrane that does not need energy to move molecules.
- 19. the cycle including rain, evaporation, and condensation
- 20. when molecules are moves from higher concentrations to lower concentrations
Down
- 1. when molecules are moved from a lower concentration to a higher concentration
- 3. the cycle including animal respiration, plant respiration, and fossil fuel combustion
- 4. gas that traps heat in the atmosphere
- 5. the solution is more concentrated than the inside of the cell
- 6. the waste product that most organisms breath out
- 9. the process plants and some bacteria use to get food
- 10. the rise of the Earth's temperature over years
- 14. the solution is less concentrated than the inside of the cell
- 15. when water passes through a membrane from a high concentration to a low concentration
- 17. a source of energy either used or stored
- 18. colorless and order less gas that most organisms need to live
