Across
- 2. a device to measure temperature
- 4. relating to Earth's internal heat
- 6. study of the Earth's surface
- 7. to suppose something without proof
- 8. a device for regulating temperature
Down
- 1. a rock containing crystals
- 2. relating to heat
- 3. to make something easier to understand
- 5. a container that keeps liquids hot or cold
- 6. a study of the Earth's structure