Across
- 3. in greek mythology she is the goddess of the earth, also called terra in roman mythology
- 4. this president celebrated the first anniversary of earth day in 1971
- 7. christopher nolan film released in 2014 about space travel
- 10. holds atoms and nuclei together
Down
- 1. 60% of the amazon rainforest is housed within this country
- 2. the only natural satellite of earth
- 5. colorless, odorless, non-toxic gas used in airships and balloons
- 6. the outermost layer of the earth and the outermost side of a slice of pizza
- 8. ⊕ is a symbol for what planet?
- 9. the celestial body around which the earth and other planets revolve