Motions of the Earth

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Motions of the Earth
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I. Earths Rotation
A. One rotation takes 24 hours or 1 day, which
is what causes day and night.
B. Earth spins counterclockwise if seen from the
North Pole.
C. The first part of North America to get
sunlight is the east coast of Canada.
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I. Earths Rotation
Trivia Question

• Do you know how many times zones there are in
  North America?

There are 6 time zones in North America!
Trivia Question

• Why so many?

D. There are 6 time zones so that sunrise can
happen at the same time all across the continent!
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II. Earths Revolution
Trivia Question

• How long does it take for the earth to revolve
  around the sun?

A. It takes 365.25 days or 1 year for the earth
to revolve around the sun.
Trivia Question

• What is Earths path called?

B. Earths path is called its orbit.
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II. Earths Revolution
Trivia Question

• How do we get seasons?

C. Earths inclination (tilt) creates seasonal
changes in climate.

• When the hemisphere is tilted toward the sun it
  gets very direct sunlight. (summer)

• When the hemisphere is tilted away from the sun
  it gets less direct sunlight. (winter)

• During an equinox, the periods of darkness and
  light are about the same.

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III. Our Moon
Trivia Question

• Does the moon rotate?

A. Our moon rotates on its axis and revolves
around the Earth. It takes 29.5 days to
completely revolve around the earth!
Trivia Question

• How many sides of the moon do we see?

B. The moons period of rotation and revolution
are the same (29.5 days), meaning we always see
the same side of the moon from the Earth!
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III. Our Moon
Trivia Question

• What is a lunar eclipse?

C.
C. A lunar eclipse is when the three align and
the earth casts a shadow on the moon. This
happens during the full moon.
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III. Our Moon
Trivia Question

• What is a solar eclipse?

D.
A solar eclipse is when the moon moves directly
between Earth and the sun. People on Earth who
are in the moons shadow cant see the sun for a
few minutes.