Rocks, Soils, and Landforms

Chemical Weathering

100

When acid rain changes the minerals in a rock, is this an example of physical or chemical weathering?

Chemical

200

What is not chemical weathering?

a. acid rain

b. iron oxide (rust)

c. tree roots

d. salt 

c. tree roots

300

True or False: Chemical weathering changes the inner makeup of the rocks and materials. 

True!

Physical Weathering

100

What is not an example of physical weathering?

a. wind

b. water

c. acid rain

C. Acid Rain

200

How can a tree cause physical weathering?

Tree roots grow in rock cracks and break it apart. 

300

When water fills cracks in rocks and freezes, it can break rocks apart. This happens because water ________ when it freezes. a. contracts b. evaporates c. expands

c. expands

Soils

100

True or False: The size of soil particles can tell a farmer if it is good enough good for farming.

True!

200

Humus is

a. the water in soil that makes it moist

b. the dead plant and animal material in soil

c. the layers of different earth materials that form soil

b. the dead plant and animal material in soil

300

Which combination of materials could be soil?

a. pebbles, sand, and silt

b. sand, silt, and clay

c. gravel, hummus, and sand

c. gravel, hummus, and sand

400

List AT LEAST three materials that soil is made of:

Possible answers could be: pebbles, sand, water, humus, clay, gravel, air

500

Which properties are important to show which kinds of soil grow plants best?

A. how well water drains through the soil

B. the amount of humus in the soil

C. The age of soil

D. The weight of soil