Unit 2 Vocabulary words

3. The solid part of the Earth's surface, not the ocean.
5. A hard hat that you wear to protect your head.
8. A very, very large area of salt water. The world has five oceans.
9. The hot, bright flames produced when something burns.
12. The marks left by a foot on the ground.
13. A type of very large animal that lived millions of years ago and is now extinct.
14. Large, white water birds with long, graceful necks.
15. Insects with hard, often shiny wing coverings.
17. Large, powerful birds with excellent eyesight that hunt for food.
18. When a type of animal or plant no longer exists anywhere in the world.
19. A small piece of rock.

1. A place with many trees; smaller than a forest.
2. Large animals with one or two humps on their backs that live in deserts.
4. A small, narrow river.
6. An animal with a hard shell on its back that lives on land and moves very slowly.
7. Areas of land that are higher than the land around them, but smaller than mountains.
10. Something that catches your attention and makes you want to learn more.
11. The natural world around us, including the air, water, land, animals, and plants.
13. A very dry area of land where it hardly ever rains, often covered with sand.
16. A large hole in the side of a hill or mountain, or underground.