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Warm-up Week 4

Warm-up Week 4. The vertical distance between trough and crest is called the ____. a. wave height c. fetch b. wavelength d. wave period A fetch is _________. a. a method of shoreline erosion b. a type of wave-cut platform c. the distance that wind travels across open water

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Warm-up Week 4

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  1. Warm-up Week 4 • The vertical distance between trough and crest is called the ____. a. wave height c. fetch b. wavelength d. wave period • A fetch is _________. a. a method of shoreline erosion b. a type of wave-cut platform c. the distance that wind travels across open water d. the circular pattern made by water particles when a wave passes • A ____________ tidal pattern has two high tides and two low tides each day. a. semidiurnal c. diurnal b. bidiurnal d. mixed

  2. What is a “Beach” anyways?! • Beach • Accumulation of sediment near water

  3. Do Beaches Change? Forces change beaches! • Push/Pull or waves & currents • This creates shoreline features.

  4. Forces that change Beaches. • Abrasion • Grinding of moving sediments • “Sand-papering” • Refraction • Bending of waves • Where sediment is deposited • Longshore Transport • Sideways shore currents • Erosion = movement

  5. 2 TypesofShoreline Features • Erosional Features • Created by moving sediment away • Depositional Features • Created by leaving a pile of sediment

  6. Erosional Features. • Wave-Cut Cliff • Flat cliff along water • Platform • Benchlike surface along cliff • Sea Arch • 2 caves join • Sea Stack • Arch falls down

  7. Depositional Features. • Spit • Long “finger” of sand • Hook at end (usually) • Bar • Shallow area • Sand peaks outofwater • Tombolo • Connects island to mainland

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