Transcript The Earth in the Universe

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
• SWBAT differentiate the
4 motions of Earth and
explain each- rotation,
revolution, precession,
and nutation
• HW= finish Expanding
Universe Questions
(50% Monday)
Agenda
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
axis, giving us day
night.
it’s
and
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)