Across
- 1. Cycle: Process of carbon movement through Earth's systems.
- 4. Fog combined with smoke or pollutants.
- 6. Radiation: Type of energy from the sun.
- 13. Mass per unit volume.
- 15. Pollution: Harmful substances in the atmosphere.
- 18. Third layer of the atmosphere.
- 19. Heat transfer through fluid movement.
- 20. Heat transfer through direct contact.
- 21. Atmospheric layer with high temperatures.
Down
- 2. Energy transfer through space.
- 3. Molecule composed of three oxygen atoms.
- 5. Cycle: Continuous movement of water on, above, and below Earth's surface.
- 7. Radiation: Heat energy emitted by objects.
- 8. Lowest layer of Earth's atmosphere.
- 9. Effect: Warming of Earth due to trapped heat.
- 10. Day-to-day atmospheric conditions.
- 11. Atmospheric layer above the troposphere.
- 12. Cycle: Circulation of nitrogen among the atmosphere, soil, and organisms.
- 14. Gasses: Gases that contribute to the greenhouse effect.
- 16. Fuel: Energy source from ancient organic matter.
- 17. Height above sea level.