Weathering and Soil

What type of weathering occurs when rainwater mixes with carbon dioxide to dissolve limestone?

• dissolving

• lichen growth

• abrasion

• root wedging

What type of weathering occurs when ice, wind, or water grind down rocks?

• lichen growth

• abrasion

• heat expansion

• dissolving

What type of weathering is heat expansion?

• chemical

• mechanical

What type of conservation method occurs when a farmer plows across the slope of hills to prevent soil erosion?

• crop rotation

• cover crops

• conservation plowing

• contour plowing

What type of conservation method occurs when a farmer plows dead weeds and stalks from previous year’s crop into the ground to help return soil nutrients, retain moisture, and hold soil in place?

• crop rotation

• conservation plowing

• cover crops

• contour plowing

Tags

NGSS.MS-LS2-5

The top layer of the soil in the diagram is composed mainly of:

• sand and clay

• solid bedrock

• decayed organic materials

Tags

NGSS.MS-LS2-3

The decayed organic material that gives soil its dark brown color is

• humus.

• clay.

• loam.

• silt.

Tags

NGSS.MS-LS2-1

Which texture of soil is best for growing plants?

• clay

• sand

• silt

• loam

Tags

NGSS.MS-LS2-1

Which soil texture is the largest in size?

• clay

• sand

• silt

The gradual breaking of rocks into smaller pieces is called

• weathering.

• erosion.