Across
- 2. the earth from the sun.
- 5. something supplied for convenience or to satisfy a need:
- 7. habitable zone- the distance from a star (sun) that could potentially provide the correct temperature for liquid water to exist. Also referred to as the
- 8. a curved path followed by a satellite as it revolves around an object in
- 12. an attraction between two objects caused by gravity
- 14. any mixture of ingredients, what is it made out of.
- 15. sun that is the primary cause of skin cancer in humans. Most UV radiation is
- 17. above the surface of the ocean. Ozone absorbs most of the ultraviolet radiation
Down
- 1. A form of radiant energy (different from visible light) from
- 3. A mixture of gases that surrounds a planet, moon, or other celestial body.
- 4. nearness.
- 6. travel in a path around another object
- 9. Zone.
- 10. the spinning of the Earth on its axis that causes day and night to occur
- 11. as an accommodation in space
- 13. Molecule made of 3 Oxygen atoms that forms a layer in the about 6
- 16. by the Ozone layer.