Understand the rock cycle: rocks slowly change from one type to another over millions of years — igneous rock weathers into sediment, sediment becomes sedimentary rock, heat and pressure create metamorphic rock, and melting starts the cycl…
A first look
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Question 1 of 3
Sam is describing a rock’s journey. Which sentence from Sam’s description shows that the rock cycle never has a first rock and keeps going forever?
Question 2 of 3
Lena learns that a piece of igneous rock can become sedimentary, then metamorphic, and finally melt back into magma. Which statement best explains why this entire journey cannot be completed in just a few years like a human lifetime?
Question 3 of 3
Which of the following sequences correctly shows a rock changing from igneous to sedimentary to metamorphic and then back to igneous?
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