Across
- 4. What is the name of the imaginary line that divides the Earth into Northern and Southern Hemispheres?
- 5. What is the largest internal organ in the human body?
- 6. What is the hardest part inside the human body?
- 8. What layer of the Earth lies beneath the crust?
- 9. What is the study of rocks called?
- 10. What natural disaster is measured by the Richter scale?
Down
- 1. What is the name of the force that slows down moving objects?
- 2. What is the name of the first man to walk on the Moon?
- 3. What part of the human brain controls thinking and memory?
- 7. What is the name of the galaxy that Earth is part of?