Follow More Than One Rock-Cycle Path

Connect rock types with the processes that form them.

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Igneous rock forms when molten material cools. Sedimentary rock can form when sediments become compacted and cemented. Metamorphic rock forms through changes without complete melting. The cycle has multiple routes, not a required starting point.

Worked example

A rock can weather into sediment, become sedimentary rock, and later change under heat and pressure. If it melts and then cools, the resulting rock is igneous.

1. Lava cools and solidifies. Which rock group forms? Sedimentary Igneous Metamorphic without change

2. Sand grains become cemented together. Which rock group is represented? Sedimentary Molten Igneous

3. A rock changes under heat and pressure without completely melting. Which group can result? Loose sediment only Lava Metamorphic

4. Must every rock pass through all three groups in the same order? Yes, always the same order No, there are different possible paths Yes, every rock starts as sandstone

5. What must happen before molten material can become solid igneous rock? It must cool and solidify It must remain completely molten It must become a fossil first

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