Across
- 4. Group of atoms bonded together
- 8. Study of the universe and celestial objects
- 9. Substance that consists of only one type of atom
- 12. Variety of different species in an ecosystem
- 13. Process by which plants make food from sunlight
- 15. Study of robots and their applications
- 17. Process of cell division
- 18. Process of change in species over time
- 20. Measure of the duration of events
Down
- 1. Substance formed from two or more elements
- 2. Study of heredity and variation
- 3. Long-term weather patterns in a particular region
- 5. Vast, almost infinite, three-dimensional expanse
- 6. Force that pulls objects towards each other
- 7. Community of living and non-living things
- 10. Instrument used to magnify small objects
- 11. Genetic material that contains instructions for life
- 14. Remains or impression of ancient organism
- 16. Basic unit of life
- 19. Tiny building block of matter