While researching a topic, a student has taken the following notes:
<ul> <li>Igneous rocks form from cooled magma or lava.</li> <li>Sedimentary rocks form from compressed sediment over time.</li> <li>Metamorphic rocks form when existing rocks are altered by heat and pressure.</li> <li>All three are part of the rock cycle.</li> <li>Each type can transform into another given the right conditions.</li> </ul> The student wants to contrast how igneous and sedimentary rocks form. Which choice most effectively uses relevant information from the notes to accomplish this goal?Which choice most effectively makes the student's point?
- A
Metamorphic rocks form from existing rocks under heat and pressure.
- Bcheck_circle
Igneous rocks form when magma or lava cools, whereas sedimentary rocks form when sediment is compressed over time.
- C
Each type can transform into another.
- D
All three rock types are part of the rock cycle.
Explanation
The goal is contrasting igneous and sedimentary formation. Choice C does so directly. A and B are similarities, D is about a third type.