Andy Foster, Andrew Wang, Kyle Weaver, and Zac Schleich

What is Shoreline Erosion?

Shoreline erosion!

Shoreline erosion- when waves hit rocks and erode them to make sea features.

Questions for YouWhy do we have beaches?

Questions for YouWhy do we have beaches?

Why do waves grow taller?

Wave EnergyWaves can travel

1,000s of kilometers

Strength and length of wind affects a wave’s size

Waves come in groups called wave trains

The Pounding SurfWaves grow tall when

in shallow waterIt can’t keep itself up,

and collapsesBreaking waves

release lots of energyWater enters cracks

in rocks and breaks parts away

Wave ErosionSea Stacks- offshore columns of rock

that were once connected to the mainland

Sea Arches- they form when waves continue to erode a sea cave

Sea Caves- form when waves cut large holes into fractured or weak rock along the base of sea cliffs

Headlands- finger-shaped projections that form when cliffs made of hard rock erode slower than surrounding rock

Wave-cut terraces- form when a sea cliff is worn back, producing a nearly level platform beneath the water at the base of the cliff

BeachesBeach- any area of the

shoreline made up of material deposited by waves.

Color and texture of the beach is the same as the source.

Some beaches are made of bright quartz, some are made of volcanic ash, and some are made from broken seashells to name a few examples.

Waves moving at an angle at the shoreline push water along the shore which creates longshore currents. When waves erode material from the shoreline , longshore currents transport the material offshore .

That creates a barrier spit or a sandbar.

Cycle of Offshore Deposits

•Waves play a major role in building up and breaking down a shoreline.

•Development of shorelines can cause major property loss, and scientists work to keep it so that it does not destroy habitat of beach animals and to keep our beaches clean and functional.

•Most shoreline erosion takes place during major storms.

•Today the coastlines of the world's continents measure about 193,000 miles.

•More powerful waves tend to erode more sand than they carry.

•Predicting shoreline erosion is important to beach-development projects.

•Light-colored sand-Most common type of sand. Made up mostly of the mineral quartz.•Fine, white-colored-sand-Found on tropical islands. Made of fine, white coral material. •Black sand-Comes from eroded volcanic lava.•Rocky sand-Formed in areas where stormy seas are common. Made of pebbles and boulders.

Light-colored sand

Black sand

Rocky sand

Fine, white-colored sand

Why do we have beaches?

Answer: We have beaches because waves carry rock to the shorelines, and that makes beaches.

Why do we have beaches?

Answer: We have beaches because waves carry rock to the shorelines, and that makes beaches.

Why do waves grow taller?

Answer: The bottom of the wave drags against the ocean floor when it is in shallow water causing the wave to grow taller.

Produced by Andrew Wang, Andy Foster, Kyle Weaver, and Zac Schleich

Writing and research by Andrew Wang, Andy Foster, Kyle Weaver, and Zac Schleich.

Pictures from Google Image Search by Andrew Wang, Andy Foster, Kyle Weaver, and Zac Schleich.

Directed by Mrs. Teaman.

WE ROCK!!!

And so do you…if you listened to our presentation!!!