Across
- 3. Animals that nurse their young with milk
- 5. Community of living and non-living things in a habitat
- 7. Planet closest to the Sun
- 9. Force per unit area acting perpendicular to a surface
- 10. Substance used to stimulate immunity against infectious diseases
Down
- 1. A form of energy
- 2. Essential nutrient for growth and tissue repair
- 4. Sour fruit that contains acid
- 6. Helps doctors listen to a patient’s heartbeat
- 8. Force that pulls objects toward Earth’s center and makes them fall back down