Across
- 2. an object, diagram or computer program that helps us understand something by making it simple or easier to see
- 7. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
- 8. how often or fast something happens
- 10. coming closer together, especially in characteristics or ideas
- 12. one of the very large sections of hard solid rock that makes up earths outer layer
- 13. Evidence of life from the past, such as fossilized bones, foot prints, or leaf prints
- 14. to examine in detail for a purpose
- 15. a sudden shaking of earths surface
- 17. the slow pulling apart of land that is caused by plate movement
- 19. a feature that forms on the surface of a planet, such as mountain, channel or sand dune
Down
- 1. the layer of soft solid rock underneath earths plates
- 3. Moving apart in different directions
- 4. earths outer most layer of solid rock that is underneath the soil, vegetation and water
- 5. the outside or top layer of something
- 6. something we observe to be similar over and over again
- 9. a large continuous mass of land conventionally regarded as a collective region
- 11. an extinct reptile that lived about 300 million years ago
- 16. the sudden pushing out of something, such as lava from a volcano
- 18. a long deep indentation formed when two plates move together
- 19. hot liquid rock on the surface of earth
- 20. hot liquid rock below the surface of earth