Geography 1

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Geography 1

• Chapter 2

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Mercury
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Venus
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Earth
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Mars
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Jupiter
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Saturn
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Uranus
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Neptune
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Pluto
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The Solar System

• Made up of planets, moons and sun
• Our solar system
• 1 sun
• 9 planets
• Spheres that orbit a star
• Jupiter Largest
• Saturn - 2
• Mercury Closest
• Many moons
• Earth has 1

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The Moon
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The Moon

• Orbits a planet
• Also called a satellite
• Many moons in our solar system
• Saturn
• 19 moons
• Venus
• 0 moons
• Earth
• 1 large

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Jupiters Moons

• Has around 60
• Ganymede
• Largest in the solar system
• Diameter 3,400 miles
• Bigger than Mercury and Pluto
• Would be a planet if it didnt orbit Jupiter

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The Moon

• Earth
• 1 large
• ¼ diameter of Earth
• Moon, Earth, Sun exert forces on each other that
  influence physical changes
• EX Ocean tides

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The Sun
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The Sun

• Our sun is small compared to others
• Alpha Centauri System
• Made up of three stars
• Alpha Centauri A
• Larger than our sun
• Alpha Centauri B
• Slightly smaller than our sun
• Proxima Centauri
• 10 of our sun
• Cant sustain life

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The Sun

• Over 100 times bigger than Earth
• Earth 8,000 miles in diameter
• Sun 865,000 miles in diameter
• Looks larger and brighter than others because of
  close proximity
• Average distance from Earth 93 million miles
• Proxima Centauri
• 25 trillion miles away
• 4.22 light years

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The Sun

• Sirius
• Nearest star visible in Northern Hemisphere
• 8.5 light years away
• 50 Trillion miles away

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The Sun - Composition

• Temperature
• 6000 deg. C 11,000 deg F
• Hydrogen Fusion
• Helium
• Almost all of Earths energy comes from the Suns
  rays
• Where does the rest come from?

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The Sun

• What types of things does the amount of solar
  energy we receive affect?
• Weather
• Vegetation
• Animal Life
• Clothing
• Homes
• Food
• Sports

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Solar Energy
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Solar Energy

• 3 things that control the amount of solar energy
  the Earth receives
• Earths Rotation
• 1 complete spin 24 hours
• Earths Axis imaginary rod running from
  N. Pole to S. Pole
• Allows surface to be exposed to the warming
  effects of the daylight and cooling effects of
  darkness

What would happen if there was no rotation?
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Solar Energy

• Earths Revolution
• The Earth traveling around the Sun
• How long does it take for one revolution?
• 365 ¼ days
• Extra day is added every four years
• Leap Year
• Feb 29th

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Solar Energy

• Earths Tilt
• Earths Axis is always pointed to the same spot
  in the sky
• North Pole
• Points toward North Star
• 23 ½ degrees from perpendicular

T
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Solar Energy

• North Pole
• Points towards the Sun
• Summertime in the Northern Hemisphere
• North receives more solar energy
• Points away from the Sun
• Winter in the Northern Hemisphere
• South receives more solar energy

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Homework

• Ch 2 Section 1 Review
• Pg. 13
• Read Section 2