Across
- 4. the sphere containing all organic matter
- 5. the blanket of gases around the earth, one of the four spheres
- 7. general weather conditions in an area over a period of time
- 8. a fossil fuel formed from dead plankton and marine matter, found in the Middle East
- 9. emission of energy as electromagnetic waves
Down
- 1. the sphere regarding the rocky outer part of the earth, made of the crust and upper mantle
- 2. the sphere concerned with all water on earth
- 3. largest carbon sink in the world
- 6. most common fossil fuel used
- 7. element of the Periodic Table with atomic symbol C