Essential Question:

Essential Question: - Description

How can beaches . be protected?. Chapter 3 Lesson 2. Vocabulary. barrier island. beach nourishment. dredging. jetty. sea wall. Sandy Beaches & Barrier Islands. Rivers pick up sand and other sediments. The rivers carry these into oceans. Ocean waves pick up the sand and sediment. ID: 223678 Download Presentation

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Essential Question:

How can beaches . be protected?. Chapter 3 Lesson 2. Vocabulary. barrier island. beach nourishment. dredging. jetty. sea wall. Sandy Beaches & Barrier Islands. Rivers pick up sand and other sediments. The rivers carry these into oceans. Ocean waves pick up the sand and sediment.

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Presentation on theme: "Essential Question:"— Presentation transcript:

Slide1

Essential Question: How can beaches be protected?

Chapter 3 Lesson 2

Slide2

Vocabulary

barrier island

beach nourishment

dredging

jetty

sea wall

Slide3

Sandy Beaches & Barrier Islands

Rivers pick up sand and other sediments. The rivers carry these into oceans. Ocean waves pick up the sand and sediment

Then

the sand & sediment get deposited along coastlines forming a beach.

Barrier Island =

land formed by the build up of sand & dirt offshore from the mainland

Examples:

Golden Isles (Jekyll, St. Simons)

Slide4

Causes of beach erosion

Rivers flowing in new & different ways

Dredging =

deepening or widening a river or harbor

Jetties =

thin, narrow wall built from the shoreline into the ocean.

Rising ocean levels = causes beaches to erode quickly

Slide5

How to stop beach erosion

Beach nourishment =

dumping new sand

Sea walls =

tall wall built along the rear edge of a beach

Sea walls don’t always work; they can cause problems. Some scientists believe it’s best to

leave the beaches alone.

Slide6

Rising ocean levels

What is happening to Earth’s temperature?

It is getting warmer & warmer

Global warming =

warmer temps cause ice & snow to melt making ocean levels rise & a change to coastlines

How does global warming affect ocean levels?

Polar regions are melting (Arctic & Antarctica)

Slide7

In summary:

What happens when sand and sediment are dropped along the coastline?

A sandy beach is formed.

What happens when sand and sediment dropped in the ocean build into a new landform?

A barrier island is formed.

Slide8

In summary:

Name 3 factors that change a beach from day to day.

ocean waves, tides, wind

Name 3 things that cause erosion.

dredging, jetties, rising ocean levels

Slide9

In summary:

Why are ocean levels rising?

Global warming causes ice & snow to melt which changes the ocean levels.

Name 2 ways to stop erosion.

beach nourishment, sea walls

However, it is best to _______________________.

Slide10

CRCT Prep

People build which of these structures to slow beach erosion?

b

arrier island

river dam

r

eservoir

s

ea wall