Rock Review

1. This fossil was found in on the schools playground. What is the best conclusion that can be drawn from this discovery?

• All of the animals that lived long ago are still alive today.
• Animals can survive in very deep rock layers.
• Parts of Virginia were once covered in sea water.
• The playgrounds are the only place to look for fossils.

2. Pumice is formed when lava from a volcano cools. Which rock type is pumice?

• a. Gaseous rock
• b. Igneous rock
• c. Sedimentary rock
• d. Metamorphic rock

3. When subjected to heat and pressure, sedimentary rocks or igneous rocks become what type of rocks?

• igneous rocks
• magma rocks
• sedimentary rocks
• metamorphic rocks

4. Granite is a hard material and forms from cooling magma.Granite is a type of

• a. lava stone
• b. igneous rock
• c. volcanic dust
• d. sedimentary rock

5. A student made observations of four rock samples. Which of these observations most likely describes a sedimentary rock?

• a. Sample 1 has bands of light and dark crystals.
• b. Sample 2 has pink, gray, and white crystals grown together.
• c. Sample 3 is made up of one huge, pale pink crystal.
• d. Sample 4 is made up of layers of sand grains cemented together.

6. Lava cools to form

• a. igneous rock
• b. sedimentary rock
• c. metamorphic rock
• d. sandstone

7. Which of these can be mined from Earth and used as an energy source?

• a. Coal
• b. Gravel
• c. Granite
• d. Limestone

8. In which type of rock do we find the most fossils?

• volcanic rock
• metamorphic rock
• igneous rock
• sedimentary rock

9. How do geologists learn what organisms were like in the past?

• they study the water
• they study the fossils
• they study the atmosphere
• they study the minerals

10. What is the process by which rocks are broken down by water, wind or living organisms into sediments?

• compaction
• cementation
• erosion
• weathering