Across
- 2. Planet with the lowest density in our solar system
- 4. Rock formed from cooled magma
- 5. Study of life
- 7. Study of heredity and genes
- 9. Powerhouse of the cell
- 10. Pure substance made of one atom type
- 12. Double helix molecule
- 14. Unit of electric current
- 15. Basic unit of life
- 18. Ratio of displacement to time
- 19. Process of cell division
- 21. Smallest unit of matter
- 23. Liquid to gas phase change
- 25. Animal that eats only plants
- 26. Measure of thermal energy
- 27. Distance light travels in a year
- 29. Force that pulls objects toward Earth
- 30. Resistance to motion between surfaces
Down
- 1. Element with symbol W
- 3. Building block of proteins
- 6. Study of earthquakes
- 8. Process plants use to make food
- 11. Substance that speeds up reactions
- 13. Negatively charged particle
- 16. Energy of motion
- 17. Rock formed from compressed sediment
- 20. Center of an atom
- 22. Atmospheric layer above the stratosphere
- 24. Ability to do work
- 28. pH less than 7