Which agents cause both chemical and physical weathering?

A.
plants

B.
wind

C.
iron

D.
tectonic plates

How does solid rock become soil?

A.
It corrodes and mixes with natural gas, inorganic matter, and oil.

B.
It splits apart and combines with plant sap, minerals, and carbon dioxide.

C.
It breaks down and combines with water, air, and organic matter.

D.
It falls apart and combines with dust particles, magma, and plant matter.

Which formation results from the breakdown of rocks and the mixing of the resulting particles with organic matter and water?

A.
mountains

B.
glaciers

C.
soil

D.
ice cracks

The plants are involved in both chemical and physical weathering of the rocks. Th chemical one comes from their decomposition, when the acids from them dissolve the rocks, while the physical one is performed by the pressure of the roots of the plants that can relatively easily break down the rocks.

2. C. It breaks apart and combines with water, air, and organic matter;

Once the rocks are weathered and eroded, than deposited as small particles, they combine with water, air, and organic matter. As all those components mix, the soil starts to form and to become fertile, thus supporting plant life on it.

3. C. soil;

The soil forms from the weathering and erosion of the rocks, as they are the ones that provide the parent material. That material mixes with water, air, and organic matter that is decomposing, thus creating a soil.