Across
- 2. a period of time that is 24 hours long and includes daytime and nighttime.
- 4. the sun, the planets that orbit the sun, and other objects that orbit the sun.
- 7. the pull between Earth and other objects, which acts even without touching.
- 10. observations or measurements recorded in an investigation.
- 11. to make a picture in your mind using information from different sources.
- 14. a description of how something works or why something happens.
- 15. something we observe to be similar over and over again.
- 16. a huge object in space that gives off heat and light.
Down
- 1. an arrangement of stars as seen from Earth.
- 3. a scientist who studies stars, planets, and other objects in the universe.
- 5. to move in a regular path around something.
- 6. information that supports an answer to a question.
- 8. the length of time it takes for Earth to orbit the sun once
- 9. something scientists make to answer questions about the real world.
- 12. an attempt to find out about something.
- 13. the only star in our solar system.