Fourth Periodical Test in SCIENCE 5

What is the process called when rocks break down over time to become soil?

• Erosion

• Weathering

• Solidification

• Crystallization

Which of the following factors primarily contributes to the weathering of rocks?

• Animal actions

• Human activities

• Temperature changes and precipitation

• Plant growth

What role do plants play in the formation of soil from rocks?

• They create wind that erodes the rocks.

• Their roots can break rocks apart.

• They add minerals to the rocks.

• They prevent rocks from turning into soil.

Which type of weathering involves the breaking down of rocks by physical processes?

• Mechanical weathering

• Chemical weathering

• Biological weathering

• Thermal weathering

What is one common way that water contributes to the weathering process?

• Water evaporates rocks.

• Water dissolves rocks.

• Water freezes in cracks, causing rocks to break.

• Water makes rocks too heavy to move.

Why are worms important in the process of forming soil from rocks?

• They eat rocks and excrete soil.

• They carry rocks to different locations.

• They mix organic material into the soil.

• They absorb water from rocks.

Which type of soil is made mostly from weathered rocks?

• Loam

• Sand

• Clay

• Silt

Which type of rock weathers most easily?

• Igneous

• Sedimentary

• Metamorphic

• Granite

Which process does NOT contribute to rock weathering?

• Water cycle

• Photosynthesis

• Animal activity

• Freeze-thaw cycle

What happens during the process of weathering?

• Rocks become soil.

• Soil turns into rocks.

• Rocks grow bigger.

• Soil hardens into rocks.