The diagram below shows the basic materials and processes involved in the rock cycle.

Question

Based on the diagram, which of the following is true?
A.
Only sedimentary rock can undergo heat and pressure to form metamorphic rock.
B.
All three types of rock can be formed when magma cools.
C.
Only metamorphic rock can be melted to form magma.
D.
All three types of rock can be weathered to form sediment.

Answer 1

Based on the provided options relating to the rock cycle, the true statement is:

D. All three types of rock can be weathered to form sediment.

Here's a brief explanation for each option:

A. Only sedimentary rock can undergo heat and pressure to form metamorphic rock. - This is false because both igneous and sedimentary rocks can undergo metamorphism.

B. All three types of rock can be formed when magma cools. - This is false because only igneous rock is formed from cooling magma. Sedimentary and metamorphic rocks are formed through different processes.

C. Only metamorphic rock can be melted to form magma. - This is false because both igneous and sedimentary rocks can also be melted to form magma.

D. All three types of rock can be weathered to form sediment. - This statement is true because igneous, sedimentary, and metamorphic rocks can all be broken down into sediment through weathering processes.