Do Now

1. What was the Big Bang?2. How long ago did it occur?3. What did the balloon lab

show us about the universe?*When you are finished, write your reflection for the week, THOUGHTFULLY. Make sure to read the topic choices. Turn it in to the inbox when done.*

Objective Agenda

• SWBAT differentiate the 4 motions of Earth and explain each- rotation, revolution, precession, and nutation

• HW= finish Expanding Universe Questions (50% Monday)

1. Do Now

2. Objective

3. Some Perspective…

4. Earth’s Motions Notes

5. Foldable

6. Tides & Eclipses Notes

7. Music Activity

8. Exit Ticket

FOLDABLE!

Foldable

Label the flaps with rotation, revolution, precession, and nutation

Under the flap write a short description and draw a picture of the motion

The Earth in the Universe

The Motion of our Home. . .

1. The Earth Rotates

• Earth rotates around it’s axis, giving us day and night.

What would happen if the Earth stopped

rotating?

2. The Earth Revolves

• Earth revolves around the sun in an elliptical pattern

• This trip takes 365.25 days

3. Precession• Precession- the change in the Earth’s rotational

axis

• As we rotate (dashed lines), the axis rotates

Precession

* As on observer on Earth, what changes would you expect to observe as a result of precession?

4. Nutation

• Nutation is a wobbling motion the Earth makes while rotating and orbiting the sun, it is caused by gravity from the sun and the moon.

• “The Wobble”

Nutation Continued

• Based on our learning on seasons, what changes could you expect to see due to the nutation “The Wobble” of Earth’s axis?

Activity – Modeling Earth’s Motions

• With your partners, you will have 10 minutes to come up with a skit/demonstration using your bodies to demonstrate Earth’s Motions.

1. Your skit or demonstration must be 2 minutes or less.

2. It must contain narration so that the audience knows what is occurring during the demonstration.

3. The following is what you must demonstrate: Rotation, Revolution, Nutation, Precession, and the 4 seasons (Remember to model the tilt of the Earth.)

Those Explain How the Earth Moves by Itself

How Does It Move in Relation to Everything else?

The Barycenter

• The Barycenter is the center of mass between two objects orbiting each other. The Barycenter for the Earth/ Moon is in the Earth

• http://www.youtube.com/watch?v=1iSR3Yw6FXo

Orbit and Planetary Motion

• In the early 1600’s, Johannes Kepler showed that planets orbits’ are elliptical (oval), not circular, in shape.

Results of the Earth’s Motions

• Tides- As the moon orbits the Earth we experience high and low tides as the Moon’s gravity pulls on the Earth

• High Tides happens when the Moon is straight above (and on the opposite side of Earth as well) and the water is pulled up by the Moon’s gravity.

Tides and Topography

• Tidal Bore – a body of water that rushes up through a narrow bay. Estuary, or river channel during the rise of high tide and causes a very sudden tidal rise.• Occur in coastal areas of China, British Isles,

France, and Canada

• Examples:• Mont St. Michel Island• Bay of Fundy

Mont St. Michel Island

Bay of Fundy

Equatorial Bulge

• Equatorial Bulge – The difference between the equatorial and polar diameters of a planet, due to the centrifugal force of its rotation.

• Earth’s Bulge• 26.54 mi or 42.72 km larger diameter at the

equator compared to the poles.

Results of the Earth’s Motions

• Solar Eclipse- Where the moon blocks the Sun’s light from reaching the Earth

• Next solar eclipse in NC April 21, 2017

Results of the Earth’s Motions

• Lunar Eclipse- Where the Earth blocks the Sun’s light from reaching the Moon (makes it so the moon can’t be seen for a little bit).

• Next Lunar Eclipse in NC April 4, 2015.

Results of the Earth’s Motions

• Other rare events include seeing other planets cross across the face of the Sun (like Venus did on June 5th, 2012, only time until 2117).

Equatorial Bulge

• Equatorial Bulge – The difference between the equatorial and polar diameters of a planet, due ot the centrifugal force of its rotation.

• Earth’s Bulge• 26.54 mi or 42.72 km larger diameter at the

equator compared to the poles.

Music Time. . .1. Split into pairs (this will be graded)

2. On your Album/ Paper, create 7 (or more) song titles that show your knowledge of:• The Earth’s motions (Rotation, Revolution, Precession,

Nutation)- at least 4 titles, one about each movement• What happens because of the Earth’s movements

(Eclipses, Seasons, Tides, etc.)- at least 2 title• What might happen if these movements stopped- at least 1

title

Funny is great, showing your knowledge is even better

You can use your notes

EXAMPLE: DAY AND NIGHT for ROTATION

Exit Ticket

1. What is precession?

2. What is nutation?

3. What would happen is rotation stopped?

4. What would happen if revolution and precession stopped?

HOMEWORK: Read and answer questions from the Hubble article (if you did not turn in today)