Science Fall Final Review
Across
- 2. the rate at which velocity changes
- 6. area around the nucleus of an atom where the atom's electrons are most likely to be found
- 8. the moon is a quarter of the way around the Earth. You can see the right half of the moon.
- 9. a community of organisms and their abiotic environment
- 12. basic unit of life
- 14. non-living things
- 17. a combination of chemical symbols and numbers to represent a substance
- 18. the number of complete wavelengths that pass a point in a given time
- 20. the actual brightness of a star
- 21. a trait that helps an organism survive and reproduce
- 22. a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
- 24. a galaxy with no regular shape
Down
- 1. relation between stars' luminosity (that is, how bright they are) and their temperature (how hot they are).
- 3. describes living factors in the environment.
- 4. Moon phase when the entire side facing Earth is illuminated.
- 5. a galaxy shaped like a flattened ball, containing only old stars.
- 7. a push or pull on an object
- 10. a subatomic particle that has a negative charge
- 11. all of the frequencies or wavelengths of electromagnetic radiation
- 13. a substance made up of atoms of two or more different elements joined by chemical bonds
- 15. the galaxy containing the solar system
- 16. a vertical column of elements in the periodic table
- 19. all the different populations that live together in an area
- 22. the struggle between organisms to survive in a habitat with limited resources
- 23. a collection of stars, dust, and gas bound together by gravity
- 25. basic unit of matter