| 1. What is the name of the largest ocean on earth? |
| 2. What are the two main metals in the earth's core? |
| 3. Which is hotter, the center of the earth or surface of the sun? |
| 4. What do you call molten rock before it has erupted? |
| 5. What do you call it after it has erupted? |
| 6. The Great Barrier Reef is found off the coast of which country? |
| 7. What do you call a person who studies rocks? |
| 8. Name the three time periods of the dinosaurs. |
| 9. True or false? The Grand Canyon is around 10000 feet (3000 meters) deep. |
| 10. What is the name of the deepest location in the world's oceans? |
| 11. Over a long period of time while under extreme heat and pressure, graphite turns into which precious mineral? |
| 12. Outside of Antarctica, what is the largest desert in the world? |
| 13. The gemstone ruby is typically what color? |
| 14. What is the name of the highest mountain on earth? |
| 15. Do stalactites rise from the floor or hang from the ceiling of limestone caves? |
| 16. 'Cascade', 'horsetail', 'plunge' and 'tiered' are types of what? |
| 17. Someone who studies earthquakes is known as a what? |
| 18. What is the name of the layer of earth's atmosphere that absorbs the majority of the potentially damaging ultraviolet light from the sun? |
| 19. The mass of the earth is made up mostly of which two elements? |
| 20. What is the second most common gas found in the air we breathe? |