Warm Up!

Warm Up!Take a look at the picture below. How do you think this

landform was created? Write at least 3 sentences.

Math EOC Practice

Warm-Up: Answer!The islands you saw in the

warm-up picture are The World Islands, off the coast of Dubai. They were created through a process called dredging, which removes sediment from the bottom of the ocean and deposits it elsewhere.

http://www.youtube.com/watch?v=p1TcQXSK_6k

Today’s ObjectiveSWBAT explain changes in sea level and the effects of human activity on shorelines and barrier islands.

Global Average Sea LevelWhat is measured on the

y-axis?What is measured on the

x-axis?Where are we currently

on this chart?How has the sea-level

behaved in the past?What do scientists

predict will happen to the sea-level in the future?

Sea Levels Around the WorldWhat do you think sea levels are like around

the world?Do sea levels only increase?Let’s find out!

http://tidesandcurrents.noaa.gov/sltrends/sltrends.html

Sea Levels in the United StatesGalveston: instead of

rising water levels, the land in Galveston actually sank!

What do you think caused the land to sink?

Do you notice anything unusual about the trends you see in this graph?

Why does this happen?Short-term causes of sea-level changes include:

WavesTidesSpecific flood events

Why does this happen?Long-term causes of sea-level changes include:

SedimentationErosionGroundwater and oil extractionGlobal warming & melting of glaciers and

ice sheets

Sedimentation

Erosion

Groundwater extraction

Time

Changes in glaciers and ice sheets

Global WarmingRising temperatures

due to global warming also contribute to rising sea levels

Warmer temperatures cause ice in the colder parts of the world to melt

Melted ice then increases the amount of water in our oceans, and causes the sea level to rise.

What does the future hold?What will rising sea-levels do to our cities?http://www.informationisbeautiful.net/

visualizations/when-sea-levels-attack/

What do rising sea levels look like?Let’s take a look!While you watch, take down notes on how a 1

foot rise in ocean levels would affect the earth.

http://player.discoveryeducation.com/index.cfm?guidAssetId=B3968D5B-BEF5-4495-B83E-F013DA646D4E

Case Study: Holland Island – A Disappearing Act!

Sea Levels in Wilmington, NC

How much are water levels increasing or decreasing each year?

Features of the shorelineA shoreline is the point at which a body of

water meets the land. Barrier Islands are narrow sandbars

parallel to, but separated from, the coast.

What must be done to protect our shorelines?Groins: barrier built at a right angle to the beach

to trap sand that is moving parallel to the shore. Beach nourishment: adding large quantities of

sand to the beach system

Hilton Head Island, SC

Hilton Head Island, SC

Hilton Head Island, SC

Hilton Head Island, SC

Groin

Hilton Head Island, SC

What do you notice about the land on Hilton Head Island?

barrier island

Hilton Head Island, SCNotice anything weird?

Say hello to the crocodile!

Partner ActivityNow that you have an idea of what Hilton

Head Island is like, flip your notes over and read the article about an event that occurred there.

After reading the article, answer the questions at the end of the article.

Textbook ActivitySection 16.3Read section and answer questions #1-12 on

page 467

Exit Ticket1.Name 2 short-term reasons why sea levels are

changing. Explain these ideas in as much detail as possible.

2.Name 2 long-term reasons why sea levels are changing. Explain these ideas in as much detail as possible.

3.How did changing sea levels affect Holland Island?

4.How are humans attempting to slow down the effects of rising sea levels? (explain 2 different ways)