Across
- 2. - Carrier of genetic information
- 3. - Lowest layer of Earth's atmosphere
- 5. - Process by which a beam of light or other system of waves is spread out
- 7. - Process by which species change over time
- 8. - Rigid outer part of the earth, consisting of the crust and upper mantle
- 10. - Chemical element with symbol Y and atomic number 39
- 12. - Study of the rates of chemical reactions
- 14. - Lightest and most abundant element in the universe
- 17. - Distance between successive crests of a wave
- 19. - Type of cell division that results in two daughter cells
- 22. - Force that attracts a body toward the center of the earth
- 23. - Subatomic particle found in the nucleus of an atom
- 24. - Substance that speeds up a chemical reaction
- 26. - Study of life and living organisms
- 27. - Group of living organisms consisting of similar individuals
- 29. - Diffusion of water through a semi-permeable membrane
- 30. - Green pigment in plants responsible for photosynthesis
Down
- 1. - Instrument measuring atmospheric pressure
- 4. - Smallest discrete amount of any physical property
- 6. - Increase in the rate or speed of something
- 9. - Variant of a chemical element differing in neutron number
- 11. - All existing matter and space considered as a whole
- 13. - Unit of energy in the International System of Units
- 15. - Preserved remains of ancient life
- 16. - Process by which green plants use sunlight to synthesize foods
- 18. - Emission of energy as electromagnetic waves or as moving subatomic particles
- 20. - Scientific study of the behavior, structure, physiology, classification, and distribution of animals
- 21. - Hypothetical study of extraterrestrial life
- 25. - Speed of something in a given direction
- 28. - Fundamental unit of matter