The Terrestrial Planets

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The Terrestrial Planets
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The Earth
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The Earths atmosphere has evolved over billions
of years

• First atmosphere _________ and _________ left
  over from the formation of the solar system
• Second atmosphere ______________ released from
  Earths interior by volcanoes
• Current atmosphere 78 _________ and 21
  ________ which was created by biological activity.

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Earths Ozone Layer

• Protects the surface from hazardous __________
  radiation from the Sun
• Earths protective ozone layer had to form
  before early life could move from the oceans onto
  dry land
• Ozone is _____________
• Can be destroyed by synthetic chlorofluorocarbons
  (CFCs)
• Slowly replenishes itself as it is created from
  sunlight and lightning

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Earths interior consists of a _____ _________
and an _________ rich core
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Earths surface is composed of about nine major
plates which slowly move relative to one another
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Plate tectonics is driven by ___________________
in Earths mantle
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Plate tectonics produced major changes to the
Earths surface over the past 200 million years
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The Earths _________ _______shield us from the
stream of charged particles from the Sun called
the _______ _____
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Aurorae
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The gravitational force between Earth and Moon
results in tides
Large _____________ occur when the Sun and Moon
are aligned such that they BOTH pull on the
Earths water.
Smaller _____________ occur when the Sun and Moon
are misaligned such that they pull on the Earths
water in different directions.
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Bouncing laser beams off the Moon demonstrates
that it slowly________ ________ from the Earth
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Gravitational forces produce the tides and keep
the same side of the Moon always facing the Earth
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The Moons surface is covered with _______,
_______, _________
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Question
Why would it not be a good idea to open a
restaurant on the moon?
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The Moon probably formed from debris cast into
space when a huge ___________ struck the young
Earth
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Mercury The Messenger
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Mercurys temperature range is the most extreme
in the solar system

• Mercurys slow _________ day rotation and the
  lack of an appreciable atmosphere means
  temperatures vary enormously from one side of the
  planet to the other.
• Daytime with the Sun overhead reaches 800F
• Midnight with the Sun completely obscured is
  -280F

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Venus The Beauty
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Venus The Beauty
The surface of Venus is completely hidden beneath
permanent cloud cover that consists of 92
___________ and ___________ acid!
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The Temperature of Venus
The ___________________ effect heats Venuss
surface
Temperature is much higher than Mercury daytime
AND nightime caused by the greenhouse effect
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Venuss Surface
Venus is covered with gently rolling hills, two
continents, and numerous ________________
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Mars The Warrior
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Mars two moons, _______ and ________, look more
like _________ than spheres
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(No Transcript)
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Pathfinder Panorama (1999)
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Intelligent Life on Mars?

• 1877, Giovanni Schiaparelli reported presence of
  canali on the surface
• canali Italian world for _______ was
  translated to __________
• Percival Lowell drew detailed maps of mars
  showing an elaborate system of canals built to
  bring water to arid regions

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Life on Mars?
Fossil?
Martian meteorite blasted from Mars _________
years ago and landed in Antarctica ____________
years ago
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Water on Mars?
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Water on Mars?
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Human Exploration of Mars?