Across
- 3. What is the largest planet in our solar system
- 5. What force pulls objects toward the Earth?
- 7. What is the center of our solar system?
- 8. What gas do humans need for breathing
- 9. Which planet is known as the Red Planet?
Down
- 1. What organ pumps blood in the human body?
- 2. What do we call animals that eat only plants?
- 4. What is the process by which plants make their own food?
- 6. What is the hardest natural substance on Earth?
- 10. What part of the plant absorbs water from the soil?