science vocab

1. is when light shifts toward the blue end showing an object is moving closer
4. is a tool used to measure the intensity of light
5. is the change in wavelength of light or sound due to motion
13. is the hot dense state of the universe right after the big bang
14. is a measure of how hot or cold something is based on the average energy of its particles
17. is when light from an object shifts toward the red end of the spectrum showing it is moving away from us
19. is the distance light travels in one year through space
20. era is the period when matter became the dominant part of the universe
23. is the rapid expansion of the universe right after the big bang

1. is a region in space where gravity is so strong that nothing can escape
2. is a pair of equal and opposite charges or magnetic poles
3. is the exact amount of matter needed for the universe to be balanced between expanding forever or eventually collapsing
6. is the vast area beyond earth where all objects in the universe exist
7. is a point where gravity is so strong that space and time become infinite
8. is a type of star that brightens and dims used to measure distance
9. is a temperature scale based on absolute zero
10. is the study of the origin structure and evolution of the universe
11. is the continuous progression of events from past to future
12. is matter made of particles with opposite charges to normal matter
15. is the apparent shift of an object when viewed from different positions
16. is a large system of stars gas and dust held together by gravity
18. is the force that comes from electric charges and creates electricity magnetism and light
21. is invisible matter that does not give off light but has gravity that affects galaxies
22. are large empty regions in space with very few galaxies