Formation of Rivers

Formation of Rivers Rivers are important sources of freshwater on Earth's surface. Rivers flow from areas of high elevation to areas of low elevation. They can begin with a ​ (a)   , where groundwater flows up to the surface, or in ​ (b)   where snow melts and flows down the mountain.

• spring
• mountains

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

As the river flows on its course, ​ (a)   , such as small streams and creeks, feed into the river and increase its water ​ (b)   .

• tributaries
• volume

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Rivers erode soil and rocks, carrying away sediments and minerals. They cut through the earth forming ​ (a)   and canyons. Rivers can fall over steep drops in a ​ (b)   , or produce turbulent conditions at ​ (c)   where the riverbed is uneven or very rocky.

• valleys
• waterfall
• rapids

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

As rivers grow old, they begin to curve as they follow the path of ​ (a)   . They pick up sediments from the ​ (b)   banks of curves and deposit them downstream on ​ (c)   banks, increasing the curvature of the river's path

• least resistance
• outer
• inner

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

The curves in a river are called ​ (a)   . At times, the river finds a new, straighter path and abandons a meander. The deserted meander is called an ​ (b)   .

• meanders
• oxbow lake

Tags

NGSS.MS-ESS2-4

meanders

• Straight paths in a river.
• Curves or bends in a river.
• High cliffs along a riverbank.
• Waterfalls in a river.

Tags

NGSS.MS-ESS2-4

Rivers mostly are made from rain fall

Los ríos en su mayoría están hechos de lluvia caída

• True

  Verdadera

• False

  Falso

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Towards the ​ (a)   of the river, the area of low elevation surrounding the river becomes susceptible to flooding when the ​ (b)   of the river receives a large amount of rain or water from tributaries.

• end
• upper portion

Tags

NGSS.MS-ESS3-2

This flood-prone area is called a ​ (a)   . A river generally widens and ​ (b)   as it approaches the ocean. Sediments that had been carried by the river settle, and a ​ (c)   forms from these deposited sediments.

• flood plain
• slows
• delta

Rivers are not the only sources of freshwater on Earth's surface. Ponds, or small bodies of still water, and lakes and reservoirs, or larger bodies of still water, also provide ​ (a)   freshwater resources.

• valuable
• bad

Tags

NGSS.MS-ESS2-4