Subtitled: Its about TIME you learn this information

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ROTATION REVOLUTION

• Subtitled Its about TIME you learn this
  information!

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The AXIS is an imaginary line through the poles
of the earth.
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The earth rotates west to east on its axis every
23 HOURS 56 Minutes
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DIFFERENT ROTATION SPEEDS cause the earth to
at the equator.
BULGE
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A STANDARD TIME ZONE is a longitude belt, 15
degrees wide, in which all areas have the same
local time. There are standard time zones.
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The INTERNATIONAL DATE LINE is the 180 degree
line of longitude.
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The Earths
PERIOD OF REVOLUTION
Is the time it takes to complete...
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One orbit around the sun. One year takes 365, 6
hours 9 minutes.
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LEAP YEAR

• Adding a calendar day every 4 years helps us keep
  in step with the earths revolution.

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Earths orbit is elliptical. Earth is closest to
the sun January 3rd, about 147 million Km Earth
is furthest from the sun July 4th, about 152
million Km. Average distance from the sun is 150
million Km or 1 AU
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23 1/2
SEASONS occur because the tilt of the earths
axis is 23 1/2 degrees.
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SPRING EQUINOX March 21
WINTER SOLSTICE December 21
SUMMER SOLSTICE June 21
AUTUMN EQUINOX September 21
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SPRING FALL EQUINOX

• Equinoxes occur
• On March 21 and September 21
• When the sun is directly above the equator
• Entire earth has 12 hours daylight and 12 hours
  darkness

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SUMMER SOLSTICE

• Occurs June 21
• Sun is directly above the Tropic of Cancer
• Summer begins in northern hemisphere, Winter in
  southern hemisphere
• 24 hours of daylight north of Arctic Circle
• 24 hours of darkness south of Antarctic Circle
• Longest amount of daylight in northern hemisphere

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WINTER SOLSTICE

• Occurs on December 21
• Sun is directly above the Tropic of Capricorn
• Summer begins in Southern Hemisphere, Winter
  begins in Northern Hemisphere
• Shortest amount of daylight in the northern
  hemisphere
• 24 hours of darkness north of Arctic Circle
• 24 hours of daylight south of Antarctic Circle

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A
B
PARALLAX is the shift of an objects position when
viewed from two locations.
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AURORAS

• Are produced when particles in the solar wind
  reach the earths upper atmosphere. They react
  with the atmospheres gases, causing streaks or
  curtains of colored light to appear in the sky.

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MAGNETIC FIELDS

• Are regions around a magnet where magnetic force
  is felt.
• MAGNETOSPHERE the area of space affected by the
  earths magnetic field.
• VAN ALLEN BELTS zones of the magnetosphere which
  contain many trapped particles.