Controlling Constructive and Destructive Forces

How are dams and levees alike?

• Both control floods.

• Both control weathering.

• Both are natural barriers.

• Both prevent coastal erosion.

Tags

NGSS.MS-ETS1-2

How can a town stop beach erosion without causing erosion in other places?

• build groins on the beach

• plant plants on beach dunes

• build seawalls along the shore

• remove buildings on the beach

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

NGSS.MS-ETS1-3

Where are you most likely to encounter levees?

• across rivers

• in cities and towns

• along the banks of rivers

• at right angles to beaches

Coastal erosion is reducing the size of a town's beach. Town leaders want to understand how to use technology to control the erosion. Which question should the leaders ask?

• How do dams trap sand?

• How do groins trap sand?

• How can storm drains reduce flooding?

• How can weather records be used to map floodplains?

Tags

NGSS.MS-ESS2-2

NGSS.MS-ETS1-4

A constructive force is defined as

• a natural occurrence that can build up or break down

• an earthquake or a volcano

• a natural force that builds up and creates new land

• a destructive force that has been controlled

Constructive forces are...

• processes that build up surface features on the earth.

• processes that wear down surface features on the earth.

Tags

8.ESS.3

In what way is a dam and a levee alike?

• hey are both built across a river.

• They are both built along the banks of a river.

• hey are both made of pipes that carry away storm water.

• They are both structures built by people to block or slow the flow of water

Tags

S5E1

What is a destructive force?

• natural process that destroys land

• natural process that creates land

• natural process where areas that are normally dry is covered in water

Tags

NGSS.MS-ESS3-2

Constructive processes build surface features. Several forces have been in action to alter the landscape of Earth for billions of years. Some are _________processes like the deposition of soil and the gradual uplifting of blocks of land along fault zones.

• slow

• rapid

Tags

NGSS.MS-ESS2-2

What is the definition of a constructive force?

• A process that lowers or tears down surface features of the earth

• A process that raises up or builds up surface features of the earth

Tags

S5E1