1. Essential Question: How can beaches be protected?
Chapter 3 Lesson 2

2. Vocabulary
barrier island
beach nourishment
dredging
jetty
sea wall

3. 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)

4. 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

5. 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.

6. 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)

7. A barrier island is formed.
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.

8. dredging, jetties, rising ocean levels
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

9. 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 _______________________.

10. CRCT Prep
People build which of these structures to slow beach erosion?
barrier island
river dam
reservoir
sea wall