Across
- 2. What Earth does around the Sun
- 5. The other 21% of Earth's surface is covered with...
- 6. The highest place on Earth above sea level
- 8. Earth has only one of these
- 9. The Moon is one ... the size of Earth
- 10. The Mariana, the lowest point on Earth
- 12. The 'Blue' Planet
Down
- 1. From biggest to smallest, Earth is the ... largest planet.
- 2. Earth's atmosphere is the only one to contain...
- 3. Earth's inner core is hotter than the surface of the ...
- 4. 79% of Earth's surface is covered with...
- 5. Earth is the only planet known to possess this...
- 7. The imaginary line around the middle of the Earth is called the ...
- 11. Every year is 365 days and 6 hours long, so every fourth year is one of these because 4 years x 6 hours/year = 24 hours