Astronomy Test 4 - Outer S. Syst/Extraterrestrial Life 3/26/03

Please put your name on the back of the last sheet only, near the staple. Good luck!

___ Has no rings 5-Jupiter
___ Where Voyager has passed last
___ Great red spot 6-Saturn
___ Lowest density
___ Four Galilean moons 7-Uranus
___ Moon Nereid has most elongated orbit
___ Has blue color and white and dark clouds 8-Neptune
___ The most distant from sun
___ Largest planet 9-Pluto
___ Most spectacular ring system
___ Moon Callisto is most cratered
___ Moon has an atmosphere almost equal in pressure to ours
___ Smallest planet in the solar system - smaller than many moons
___ Has the largest moon in the solar system
___ Moon Triton revolves in retrograde
___ Most similar to a huge comet nucleus

Multiple choice - 3 each (above were 2)

___ A comet nucleus is about
1-10,000 km across.
2-10,000,000 km across.
3-100,000 km across.
4-10 km across.

___ A comet's dust tail seems to point
1-towards a particular constellation called the radiant.
2-away from the Sun.
3-in the direction the comet came from.
4-away from Earth.

___ The oldest recognizable fossils exist in rocks that have been determined to be
1-3.5 billion years old.
2-4.5 billion years old.
3-15 billion years old.
4-65 million years old.

___ Global warming is caused by
1-too little ozone in the atmosphere.
2-too much UV radiation from the Sun.
3-too many earthquakes in recent decades.
4-too much carbon dioxide in the atmosphere.

___ The moon Europa might have creatures living
1-high in the clouds
2-inside its volcanoes
3-in the water under its icy crust
4-on top of the polar caps

___ Most of the asteroids orbit between the orbits of
1-Venus and Mars
2-Mars and Earth
3-Jupiter and Saturn
4-Mars and Jupiter

___ Our best bet for contact with extraterrestrial civilizations is through
1-UFO landings
2-a concentrated effort to send rocket ship to other stars
3-sending unmanned space probes
4-radio communication

___ The number of communicative civilizations in our galaxy is limited by
1-the size of the average planet
2-the survival time of technological societies
3-21-cm radiation
4-their distance from earth

___ How many rings does Saturn have?

___ The primary source of geologic activity, volcanoes and earthquakes on Io is
1-solar illumination.
2-tidal heating.
3-radioactive decay.
4-magnetospheric heating.

___ What are the chances of an asteroid impact next year that might wipe out all or nearly all life on Earth?
1-zero-no chance
2-one in a thousand
3-one in a million
4-one in 100 million

___ The oldest recognizable fossils exist in rocks that have been determined to be
1-65 million years old.
2-4.5 billion years old.
3-3.5 billion years old.
4-15 billion years old.

___ The moon has craters that are 4 billion years old; however, the Earth does not because
1-erosion makes Earth’s impact craters incredibly difficult to identify.
2-Earth’s gravity diverts impactors before collision.
3-the Moon shields Earth from impacts.
4-Earth’s atmosphere burns up large impactors before impact.

Short answer - 6 each - Previous were three.

1. Give two reasons why the asteroids could not be the remains of a planet that exploded.

2. Tell all you can about the moon Europa.

3. With the aid of a diagram, show where short and long period comets come from.

4. What evidence do we have within the past ten years that major collisions are still occurring in the solar system?

5. What is the theory of evolution? Does it say men descended from monkeys? Explain.

6. How would an asteroid impact have caused the extinction of the dinosaurs? Explain with as much detail as you can.

7. Where on earth have most meteorites been found? Why?