Across
- 4. The largest ocean on Earth
- 5. The hardest natural substance
- 6. The longest river in the world
- 7. The scientist who discovered gravity after seeing an apple fall
- 9. The planet known as the "Red Planet."
- 10. The largest mammal in the world
- 11. The instrument used to measure earthquakes
Down
- 1. The process by which plants make their own food
- 2. The first Prime Minister of independent India
- 3. The gas plants absorb from the air
- 8. The fastest land animal