Weathering and Soil Quiz

A marble statue is left exposed to the weather. Within a few years, the details on the statue have begun to weather away. This weathering probably is caused by

• Oxygen in air

• Carbonic acid in the rainwater

• Lichens

• Abrasion

The most important factors in determining the rate of weathering are

• Carbon dioxide and acid rain

• Abrasion and acid rain

• Animal actions and oxygen

• Rock type and climate

Loam is made up of

• Pure humus

• Mostly clay

• Nearly equal amounts of silt, sand, and clay

• Sand and gravel

What can cause the loss of soil not protected by plant cover?

• Chemical weathering

• Erosion by water and wind

• Deposition

• Too many organisms in the soil

What kind of weathering causes the mineral composition of rocks to change?

• Mechanical weathering

• Permeable weathering

• Chemical weathering

• General weathering

A hot, wet climate causes weathering to take place

• Slowly

• Unevenly

• Rapidly

• Climate does not change the rate of weathering

Soil formation begins with the weathering of

• Loam

• Bedrock

• The A horizon

• Humus

Which soil layer is rich in humus?

• A horizon

• B horizon

• O horizon

• Bedrock

All of the planets of our solar system

• Rotate

• Revolve

• Radius

• Rewind

In the heliocentric model, Earth revolves around

• Mars

• The stars

• The moon

• The Sun