Science Unit 5 Weathering and Erosion Review

by Thalia Ortiz

Science Unit 5 Weathering and Erosion Review

​Quick Review

Deconstructive Processes:

Processes that break something down​

• Weathering - the process of breaking something into smaller pieces called sediment

• ​Erosion - the process of moving the sediment

Constructive Processes:

​Processes that build something new

• ​Deposition - When the sediment is dropped off and makes something new

​Fun Facts - Sand Dunes Edition

​Did you know that sand dunes protect the coast line? Without them, storms will force ocean water farther along the

beach.

​

​Sand dunes last longer when there are plants, or vegetation, to hold the sand in place

Multiple Choice

This is an image of a changing shoreline. Which BEST explains why the shoreline of the

barrier island has changed since 1950?

• After years of taking the impact of

  destructive forces like storms, the sand of

  the shore slowly eroded away.

• After years of taking the impact of

  destructive forces like storms, the sand of

  the shore slowly depositioned away.

• After years of taking the impact of

  destructive forces created sand dunes and it made the shore bigger.

Multiple Choice

How are deltas formed?

• Deposition is a destructive force that dumps sediment to the

  mouth of the river to make a new landform.

• Deposition is a constructive force that dumps sediment to

  the mouth of the river to make a new landform.

• Erosion is a destructive force that dumps sediment to the

  mouth of the river to make a new landform.

• Erosion is a constructive force that dumps sediment to

  the mouth of the river to make a new landform.

​How can we control flooding?

​Levees are great ways to control flooding. The BEST levees are able to absorb water.

​Dams can help prevent flooding too! They control the water flow down stream.

​Storm drains are also used in cities to help control flooding. They are often found on the side of the road and look like big holes in the ground. They collect water from rainfall to keep the streets from flooding.

Multiple Choice

What happens when more water enters a stream?

• Nothing, the water stays the same.

• The water flow grows stronger and causes the stream to erode away the river bed. This makes the stream grow bigger over time.

• The water flow grows stronger and causes the stream to erode away the river bed. This makes the stream get more shallow over time.

Multiple Choice

What causes an earthquake?

• When tectonic plates shift and release energy that causes the ground to shake.

• When the earth shakes really hard.

• When the earth spins too fast.

• When the tectonic plates accidentally bump into each other.

​Did you know...

​Volcanoes are not all bad! Under water volcanoes formed the Hawaiin islands when their lava and magmacooled off to form rock/islands.

Multiple Choice

Which argument BEST explains how can cutting away trees for a farm create canyons after a couple of hundred years?

• Rain can wash away the soil and deposit it to form mountains.

• After several years of heavy rain a river formed and the river eroded the soil forming canyons.

• Rainwater formed small ditches that grew. As the ditches grew, erosion increased which created the canyons.