Across
- 6. What will happen to the Earth's oceans
- 7. The phase that the Sun will be in 6 billion years from now
- 8. The _____ of Earth will be too hot to support life
- 9. The Earth will be _______ by the Sun
- 10. The phase that the Sun is currently in
Down
- 1. The element that is currently fused into helium
- 2. What humans and life need to survive on Earth
- 3. The pressure from hydrogen fusion counteracts the force of _____
- 4. After becoming a red giant, the Sun will begin a process of _____ fusion
- 5. In about one billion years, the Earth will become a hot _______