Class 30: Tides, Waves, Tsunamis, Beaches. Today’s topics: Tides Wave features Beaches & Coastlines Tsunamis Class Updates Reading: 16.3-16.4; 16.6-16.8.

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Presentation transcript:

Class 30: Tides, Waves, Tsunamis, Beaches

Today’s topics: Tides Wave features Beaches & Coastlines Tsunamis Class Updates Reading: ; Homework #5 posted, due Wed. 4/30 Final Exam: Mon. May 10am Class 30: Tides, Waves, Tsunamis, Beaches

Ocean Tides - What Causes Them?

Ocean Tides From Gravity F ~ M / R 2 F = force M = mass R = radius

Tidal Pulls: Moon vs. Sun Which exerts a greater pull - Moon or Sun?

Daily Tides from the Moon

Monthly Tides: Moon Phases & Sun

Extreme Tides low tide high tide Bay of Fundy (Nova Scotia, Canada)

Which statement is most correct about spring tides? a. They occur in the spring. b. They occur when the sun, the moon and the Earth all fall on a straight line c. They are the largest high tides on Earth d. Both statements b and c are true.

a. Yes, and they would be much LARGER b. Yes, but they would be much SMALLER c. No, we would not have tides d. Maybe, it depends on the season If Earth didn’t have a moon, would we still have tides?

Sea Waves

Circular Motion of Water

Types of Waves

Sediment Transport Along Coastlines

Beaches

Rocky Coastlines cliffs plaforms

Sandy Coastlines Barrier Islands

Tsunamis Banda Aceh, Sumatra, Indonesia December 26, 2004 Magnitude 9.3

Tsunamis Underwater fault 1. BIG earthquake 2. Tsunami generated 3.

Tsunami Animation

Tsunami Example: Sumatra

Tsunami Example: Alaska

Review: Ocean in Motion