7.2.1

Match the description with the correct term.

• drainage basin

• An S-shaped pattern formed in a stream of river as water meanders back and forth on the landscape.

• delta

• an area of land where surface water, rain, and snowmelt flow from higher elevations to a single body of water at a lower elevation.

• alluvial fan

• a stream descends a steep slope and reaches a flat plain, the speed of the stream suddenly decreases. As a result, the stream deposits some of the sediment on the level plain at the base of the slope.

• channel pattern

• a river flows into a larger body of water, such as an estuary or ocean, the water slows down. The deposited sediment forms a roughly triangular structure at the mouth of the river.

Tags

NGSS.MS-ESS2-4

A straight stream on a gentle slope may develop S-shaped curves and become ​​ (a)   stream. A stream deposits sediment on the ​ (b)   of curves and erodes the other sides. As a result, the curves ​ (c)   and the floodplain ​ (d)   .

• a meandering
• insides
• increase
• grows wider
• a straight
• outsides
• decrease
• grows narrower

Tags

NGSS.MS-ESS2-4

Which of the following would occur as a result of a river flowing into an estuary or ocean? Keep in mind that where a river flows into a larger body of water, the water slows down. Choose all correct answers.

• A deep, incised stream is formed.

• Gravel and sand are deposited close to the river mouth, where water begins to slow.

• Silt and clay are deposited where the water moves slowly.

• A delta forms from the sediment at the mouth of the river.

Tags

NGSS.MS-ESS2-2

Organize these options into the right categories

Groups:

(a) alluvial fan

,

(b) delta

,

(c) both

,

(d) neither

• Specific beds form based on the size of particles.

• The speed of the stream slows down.

• Gravel, sand and silt are deposited.

• A stream descends a steep slope and reaches a flat plain.

• A fan-shaped deposit is formed.

• More likely to trigger tornadoes.

• Water speeds up as it deposits gravel, sand, and silt.

• A triangular-shaped deposit is formed.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-2

NGSS.MS-ESS2-1

Rainwater containing carbonic acid seeps into the ground. It dissolves limestone and forms open spaces, or ​ (a)   . When water seeps through the rock and drips slowly into an empty space, it may form ​ (b)   on the ceiling and ​ (c)   below. During a dry period, when the water table is low, spaces that are no longer filled with water may collapse and form ​ (d)  

 

• caverns
• stalactites
• stalagmites
• sinkholes
• mountains
• puddles
• rivers

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-2