3rd Grade Rock Quiz

1. What are the three major classifications of rocks?

2. What do you call hot , liquid rock that is still inside the earth?

3. Name the mineral that is used to make the "lead" in pencils.

4. What do you call a line drawn with a rock on a special porcelain plate?

5. What is hot, liquid rock called after it has come out of a volcano?

6. What kind of rocks have been changed by heat and pressure insde the earth?

7. Name a type of rock that is burned as a fuel.

8. Separating rocks and minerals into different groups according to color, texture, and luster is called_________________.

9. What is the hardest natural substance on earth?

10. What kind of rock is formed when magma or lava cools and hardens?

11. What do you call the way a rock or mineral reflects light?

12. What do you call plants and animals that are preserved in rocks?

13. Name two kinds of rocks that can split apart into very thin, flexible layers.

14. What kind of rock is formed in layers, usually at the bottom of an ocean or lake?

15. Name a type of igneous rock that floats.

16. Solid substances that are found in the earth's crust are called _________.

17. What force uses wind and water to wear down rocks?

18. What do you call the way a rock or mineral feels?

19. Rocks are made up of one or more ____________.

20. The changing of rocks from one kind to another over millions of years is called the ___________.

True / False

1. All rocks leave a streak on a streak plate.

2. Classifying things into groups can help us to identify them.

3. Hydrochloric acid will dissolve all kinds of rocks.

4. Crystals are always the same size and shape.

5. Rocks and minerals are valuable natural resources.

6. Much of the surface of the earth was formed by volcanic activity.

7. Quartz is a very soft mineral.

8. Crystals that cool very slowly form large crystals.

9. The Hawaiian Islands were formed by volcanoes.

10. The way a rock or mineral reflects light is called its texture.