Moon, Meteorites, and Misc.

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Moon, Meteorites, and Misc.
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1. What are the causes of the seasons on the
earth?

• THE TILT OF THE EARTHS AXIS (23.5 DEGREES)
• NORTH HEMISPHERE TILTS AWAY (WINTER)
• THEN TOWARDS THE SUN (SUMMER)

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2. What would our seasons be like if the earths
axis were not tilted?
There would be no variation in season Seasons
would depend on how far from the equator you
happen to be
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3. What is the difference between apogee and
perigee?
APOGEE The point in the moons orbit farthest
from the planet
PERIGEE The point in the moons orbit closest
to the planet
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The moon at apogee and perigee
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4. Label and draw the positions of the earth,
moon, and sun during total solar and lunar
eclipses.
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• Solar Eclipse When the earth, moon, and sun are
  aligned such that the earths view of the _______
  is blocked out.

sun
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The Solar Eclipse
Will only occur during a NEW MOON
WHY ??? - Since the moon is illuminated on the
side we dont see, we see only a dark disc.
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SOLAR ECLIPSE
Moons shadow on the Earth
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• Lunar Eclipse When the earth, moon, and sun are
  aligned such that the earths view of the _______
  is blocked out.

moon
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The Lunar Eclipse
Will only occur during a FULL MOON
WHY ??? - Since the moon is illuminated on the
side we see, we see a bright disc.
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Define the following terms

• ASTEROID BITS AND PARTS OF OLD PLANET MATERIAL
• ASTEROID COLLISION ASTEROIDS BREAK INTO SMALLER
  BITS

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Define the following terms

• 3. METEOROID ASTEROID MATERIAL FALLING TOWARDS
  THE EARTH
• 4. METEOR MATERIAL BURNING AS IT FALLS THROUGH
  THE ATMOSPHERE
• 5. METEORITE METEOR THAT REACHES THE EARTHS
  SURFACE

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6. What is a comet?

• A SMALL, ICY OBJECT THAT ORBITS ABOUT THE SUN IN
  A VERY, VERY LONG, THIN ELLIPSE
• THE TAIL ALWAYS EXTENDS AWAY FROM THE SUN
• 1 10 KM IN SIZE

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7. Explain how and why we see comets from the
earth

• AT APHELION, THE COMET IS BEYOND THE ORBIT OF
  PLUTO
• AT PERIHELION, THE COMET IS VERY CLOSE TO THE SUN
  AND BEGINS TO EVAPORATE TO FORM A GLOWING HEAD
  AND TAIL.