Understanding Water and Weathering

The ability of a stream to erode and transport material depends largely on its

• width

• velocity

• length

A stream’s discharge

• remains the same throughout its course

• decreases between its source and mouth

• increases between its source and mouth

Tags

NGSS.MS-ESS2-4

Most streams carry the largest part of their load

• as bed load

• in suspension

• on their surface

Which of the following weathering processes involves the constant freezing and thawing of water?

• exfoliation

• frost wedging

• spheroidal weathering

A depositional feature that forms where a stream enters a lake or ocean is a

• meander

• delta

• distributary

One major cause of stream flooding is

• rapid spring snowmelt

• light rain over a large area

• a decrease in stream discharge

Sinkholes can form when

• rainwater containing carbon dioxide dissolves underground rock

• minerals dripping from a cavern ceiling form stone pendants

• the water table rises due to flooding

Tags

NGSS.MS-ESS2-2

The process that occurs when physical forces break rock into smaller pieces without changing the rock’s chemical composition is called

• chemical weathering

• mechanical weathering

• erosion

Chemical weathering is highest in areas that are

• dry and arid

• cold and wet

• very warm and wet

Deflation affected the Dust Bowl in the 1930s by

• creating rock pinnacles

• building up sand dunes

• lowering the land