Rocks & Minerals

How many groups of rocks does the passage name? 

• One 
• Two 
• Three

What does the author describe in the passage? 

• How different groups of rocks are made. 
• Why there are only three different rock groups. 
• Which group of rocks is the most common on Earth. 

Metamorphic rocks are rocks that were previously a different type of rock. What evidence from the passage supports this conclusion? 

• A metamorphosis is a kind of change that something undergoes
• Metamorphic rocks start as igneous or sedimentary rocks. 
• Examples of metamorphic rocks are slate and marble. 

What is the passage mostly about? 

• sedimentary, igneous, and metamorphic rocks
• rocks that are created from lava or magma
• rocks that are created from sediment.

Read the following sentences: "Sedimentary rocks begin as sediment at the bottom of rivers, lakes, and oceans. Sediment is made of small pieces of sand, clay, and shells. The weight of water presses down on the sediment until it becomes hard."  
Based on this information, what can you conclude about sedimentary rocks? 

• Sedimentary rocks are harder than igneous rocks. 
• Some sedimentary rocks have shells in them. 
• All sedimentary rocks are found far from water. 

Choose the answer that best completes the sentence below. 
Metamorphic rocks form ________ heat and heavy pressure cause igneous or sedimentary rocks to undergo metamorphosis. 

• because
• but 
• so