You are walking around the school ground and you see your friend sitting in the sun and looking into a box.
Inside the box you see a large rock.
You ask your friend what she is doing.
She explains that she has learned that soil is formed from weathering rocks.
She also says that heat from the Sun can cause rocks to weather, so she is waiting for the rock to turn into soil.
Explain why she will not see the rock turn into soil.