Across
- 1. Not transparent
- 6. A round object, like a ball
- 7. To watch carefully, to use the five senses carefully
- 9. The science that studies stars, planets, and the universe
- 11. An idea that scientists make to explain facts
- 12. The sun moves around the earth
- 13. Pluto is a ______ planet
- 14. Move around something
Down
- 2. A scientist who studies stars
- 3. Past tense of "understand"
- 4. The earth moves around the sun
- 5. Something that a person likes to do a lot, but not for work or school
- 8. Past tense of "think"
- 10. To make something look larger
- 15. Mercury, Venus, Earth, and Mars are ______ planets