1. Why did the author write this selection?

• A. to entertain the reader with a funny story
• B. to inform the reader about a topic and its importance
• C. to persuade the reader to visit the Grand Canyon
• D. to show how rocks are made

2. Because rocks are the building block on this planet, ----

• F. they are very important
• G. we should not give them any importance
• H. they are protected by the government
• J. everyone uses them to build their furniture

3. How many minerals does it take to form a rock?

• A. over 100
• B. less than 50
• C. 10 or more
• D. 1 or more

4. Another name for space rocks is _______.

• F. meteorites
• G. asteroids
• H. constellations
• J. comets

5. Geologists usually sort rocks into ____ different kinds.

• A. ten
• B. five
• C. three
• D. one

6. Because layers of minerals pile up over a long period, -----

• F. igneous rocks cool down
• G. sedimentary rocks are formed
• H. metamorphic rocks disappear
• J. limestone is replicated

7. The Rock Cycle is the result of ----

• A. rocks becoming endangered
• B. the condensation formed in clouds
• C. the changes that rocks go through
• D. the food chain involving animals and plants

8. What example of a text feature can we find on page 642?

• F. diagram
• G. table
• H. bar graph
• H. actual numbers

9. When sedimentary rocks are being formed, what is the middle layer composed of?

• A. water
• B. layers
• C. nutrients
• D. sediment

10. Which of the following type of rock is used to make pencils?

• F. limestone
• G. graphite
• H. sedimentary
• J. slate