Review of Earth's Motions and Tides

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Presentation transcript:

Review of Earth's Motions and Tides

Warm Up

Bill Nye Answer the questions that go along with this short video https://www.youtube.com/watch?v=KUU7IyfR34o Answer the questions that go along with this short video They will be collected and graded

Let’s Review!

Tell me what you know! What is an axis? How many motions does Earth have? What is precession? What is nutation? What is a rotation? What is a revolution? What causes seasons?

Match the Terminology!

Tides

What are tides? Tides are the rising and falling for the sea due to the attraction of the sun and moon The Moon has a greater effect on tides than the Sun

Cycle of Tides Sea level rises High Tide Sea level falls Low Tide Cycle starts over

Cycle of Tides Diurnal - one high tide and one low tide Semidiurnal - two high tides and two low tides Tide Cycle = 24 hours and 50 minutes Do the Earth and Moon rotate in the same direction?

Low vs High High tides are caused on the side of the Earth directly below the moon and on the opposite side Low tides are on the side of the Earth that are located at the 90 degree angle

Gravity and Inertia Gravity - major force behind tides Inertia - counterbalance of gravity

Types of Tides High - sea level at its highest Low - sea level at its lowest Spring - Sun and Moon aligned to create tides higher than high tides and lower than low tides Neap - Sun and Moon create a 90 degree angle and create lower tides than usual

Spring tides occur during full and new moons Neap tides occur during quarter moons

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