Across
- 2. Substance with a pH less than 7, sour taste.
- 4. Community of living organisms and their environment.
- 7. Process of gradual change and development over time.
- 9. Object with a magnetic field.
- 10. Study of interactions in nature.
Down
- 1. Force that attracts objects toward each other.
- 2. Basic building block of matter.
- 3. Basic unit of life.
- 4. Capacity to do work or cause change.
- 5. Gas in the Earth's atmosphere, protects from UV radiation.
- 6. Relating to the Sun.
- 8. Push or pull that can change the motion of an object.