2Wave Formation (P114-115½ ) What is a Wave? How do most waves form?List the 3 things wave size depends on.Do waves move water toward shore?What actually happens to objects as a wave passes?
3Wave Formation (P114-115½ ) What is a Wave? The movement of energy through a body of waterHow do most waves form?When winds blowing across the water’s surface transmit their energy to the waterb) List the 3 things wave size depends on.The strength of the wind, how long it blows, and the distance it travels.
4Wave Formation (P114-115½ ) 2. Do waves move water toward shore? No, they only transfer energy. Otherwise, water would pile up on the coasts.What actually happens to objects as a wave passes?As a wave passes, water particles move in a circular path. The deeper below the wave, the smaller the circle.
5Draw a picture like on p116 and label these parts. Describing Waves (P )Define a Crest.Define a Wavelength.Define Frequency.Define a Trough.Define Wave Height.What happens to waves as they reach shore?What is Undertow?*Or*Draw a picture like on p116 and label these parts.
7Describing Waves (P116-117) Crest – highest part of a wave Wavelength - horizontal distance between crestsFrequency – number of waves that pass a point in a certain amount of timeTrough – lowest part of a waveWave Height – vertical distance from crest to trough.
8Describing Waves (P )6. What happens to waves as they reach shore? The wave begins scraping the ocean floor, causing friction and slowing the wave. Wave height increases as wavelength decreases. At a certain height, the wave topples or breaks on shore 7. What is Undertow? Force of gravity pulling water back to the ocean.
9The Shore & Erosion (P118-120) What effect does Longshore Drift have?How can you escape a Rip Current?What is Erosion?How does erosion affect beaches?Describe 3 ways to reduce beach erosion.Are Groins a positive choice?
10The Shore & Erosion (P118-120) What effect does Longshore Drift have?Waves hit the beach at an angle, transporting sand along the beach.How can you escape a Rip Current?Rush of water that flows back through a narrow opening – swim parallel to beach2. What is Erosion?Carrying away of sedimentsHow does erosion affect beaches?Causes the shoreline to move further inland.
11The Shore & Erosion (P118-120) 3. Describe 3 ways to reduce beach erosion.1. Groins – a wall that stretches out from the beach2. Dunes – hills of sand covered with plants, which hold it together3. Barrier Beaches – small island-like sand deposits parallel to beachAre Groins a positive choice? No, they increase the amount of erosion down the beach.
12Tsunamis (Page 121)How do Tsunamis compare to regular waves in size and strength?Describe how tsunamis form.
13Tsunamis (Page 121)How do Tsunamis compare to regular waves in size and strength?Can have a wavelength of 200km and a crest 20m highDescribe how tsunamis form.An underwater earthquake sends a massive pulse of energy through the water around it.
14Section 4.1 Review (Page 141) Define Key Terms for Section 4.1 Know the wave diagrams on pages 116 & 117