Across
- 3. The speed at which light travels in a vacuum (5)
- 5. The study of heredity and variation in organisms (8)
- 6. The protein that carries oxygen in red blood cells (10)
- 8. The force that attracts a body toward the center of the Earth (7)
- 9. The process of water changing from liquid to gas (11)
- 10. The SI unit of force (6)
- 11. The smallest unit of life (4)
- 12. The organ responsible for pumping blood in the human body (5)
- 14. A positively charged subatomic particle (6)
- 15. The chemical element with atomic number 79, known for its value (4)
Down
- 1. A device used to measure temperature (11)
- 2. The process by which plants make their own food using sunlight (14)
- 4. The gas essential for human respiration (6)
- 7. The basic structural and functional unit of the nervous system (6)
- 10. The scientist who proposed the three laws of motion (6)
- 13. The study of the interactions of organisms with their environment (7)