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 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

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 mi or 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 Solar Eclipse 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). Lunar Eclipse 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 5 th, 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 mi or km larger diameter at the equator compared to the poles.

Music Time 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)