Across
- 2. opening in Earth's crust through which lava and ash erupt
- 4. visits to a doctor
- 7. volcanoes that are erupting or that are expected to erupt in the near future
- 8. a force of energy that shakes the ground
- 12. floods that affect areas next to the coast
- 14. the way in which different parts are put together to make something
- 16. giant section of Earth's crust
- 18. the edges of tectonic plates
- 19. an object that is made to block or get in the way of something
Down
- 1. not having enough food to feed people
- 3. a crack or weak point in Earth's crust
- 5. countries countries where many people are poor and uneducated
- 6. circular movements of material in the mantle
- 9. force or strong effect
- 10. a large wave of water caused by an earthquake in the ocean's crust
- 11. measures time in millions of years not months or years
- 13. molten rock that cools on Earth's surface
- 15. heated to a very high temperature so that it becomes liquid
- 17. a serious disease carried in water that causes diarrhea and vomiting and may result in death
- 20. emergency help given to people who are in need