Across
- 3. what is the infinite density and intense heat that came from the big bang called?
- 8. energy, What is the force pulling the universe apart and causing it to expand at a high speed?
- 9. what is a giant cloud of gas and dust in space?
- 10. , what is the electromagnetic radiation left over from the big bang
- 11. what is the study of the universe?
- 13. , what is the distance light travels in a year?
- 15. system, what is the sun and all the objects that revolve around the sun because of gravity called?
- 17. Bang, What is the theory that all matter and energy were at one time compressed into a very small hot dense spot?
- 18. A celestial body orbiting around a star?
- 19. what is the ability to do work?
Down
- 1. , what is the most abundant element in the universe?
- 2. everything that exists all matter, all energy, space, and time?
- 3. galaxies, what are a rotating type of galaxy with a central bulge spiral arms with stars, gas, and dust.
- 4. who are the scientist that study the universe beyond earth?
- 5. what is the explanation to a scientific question that can be tested called?
- 6. Fusion, what is the process in which low-mass nuclei combine to form a more stable nucleus?
- 7. what is a super-dense core left after a supergiant explodes as a supernova?
- 12. what is a large group of stars held together by gravity?
- 14. what is the system of ideas intended to explain something?
- 16. Matter, what is 85% of the universe made out of?