Orbit – the path the earth takes to travel around the sun.
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Transcript of Orbit – the path the earth takes to travel around the sun.
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Rotation & Revolution
How does the movement of the sun, earth, and moon relate to days, lunar cycles, and years?
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Orbit – the path the earth takes to travel
around the sun.
sun
orbit
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ROTATION
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Rotation – the Earth spinning on its axis.
earth
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Period of Rotation –The amount of time it takes
for this rotation to happen: one day (24
hours)!
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Rotation A=Axis
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REVOLUTION
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Revolution - the motion of the Earth orbiting around
the sun.
• sunearth
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Period of Revolution – the amount of time it takes for an object to orbit around the sun once: One year (365 Days).
sun earth
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Every planet revolves around the Sun! The closer you get to the sun the shorter the revolution/orbit.
Longer years
Shorter years
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Rotation/Revolution Animation:
http://esminfo.prenhall.com/science/geoanimations/animations/01_EarthSun_E2.html
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Revolution
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Review QUESTIONS:
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What does each letter represent?
• earth
sunsun
A
B
C
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Rotation or Revolution?
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Rotation or Revolution?
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Rotation or Revolution?
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SOLAR & Lunar ECLIPSE
Objective: What is the difference between a solar and a lunar eclipse?
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South Pole
North Pole
Solar Eclipse Details
Sun Moon
A solar eclipse occurs when the moon comes between the Earth and the sun.
MMS= Moon Middle Solar
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Partial Solar Eclipse
• The moon passes between Earth and the Sun. The moon covers part of the sun.
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Total Solar Eclipse
• Moon passes directly between Earth and the Sun. Moon blocks our view of the Sun. Only the Sun’s corona is visible.
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Annular Solar Eclipse
• Moon passes directly between Earth and the Sun. The moon appears smaller than in a total eclipse because it is further from the earth.
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LUNAR ECLIPSE
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A Lunar Eclipse
Moon
Sun
Earth
Moon’s Path
During a Lunar Eclipse the Earth’s shadow falls on the moon and the moon can look RED!!!
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The moon becomes a blood red color during a total lunar eclipse. No wonder that ancient cultures feared the appearance of the moon during a lunar eclipse.
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Review Questions:
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Answer
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What type of eclipse?
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• Earth’s axis goes directly through _______.
a. The north and south poles
b. The sun
c. The common center of mass
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• When we watch the sun rise and set we are actually experiencing Earth’s ____.
a. Rotation on its axis
b. Revolution around the sun
c. Revolution around the moon
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• Fewer people can see total solar eclipses than lunar eclipses because
A) the Moon casts a smaller shadow than Earth does
B) solar eclipses almost never happenC) only people at the South Pole can see
solar eclipses
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• When Earth is directly in between the Sun and the Moon, people on Earth experience a __________.
A) lunar eclipse
B) solar eclipse
C) half Moon
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• When the Moon is directly in between the Sun and Earth, some people on Earth may experience a __________.
A) solstice
B) lunar eclipse
C) solar eclipse
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• A lunar eclipse occurs when ___.
A) the Sun passes into the Earth’s shadow
B) the Earth passes into the Moon’s shadow C) the Moon passes into Earth’s shadow
D) the Moon passes into the Sun’s shadow
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• When a lunar eclipse occurs what happens to the Moon?
A) It vanishes from existence, to be recalled on the whim of a magician.
B) It is covered in shadow and hidden from view for a brief time.
C) It becomes extraordinarily bright.D) Nothing happens to it.
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• When a solar eclipse occurs, what happens to the Moon?
A) It falls into the Earth’s shadow.
B) It moves between the Earth and the Sun, causing a part of the Earth to fall into its shadow.
C) It lies outside of a straight line connecting the Earth and Sun.
D) It disappears from view.