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Astronomy 1P02 Second 50

Brock University
STUDY
PLAY
The planet closest in size to Earth is
Venus
The distance of Jupiter from the Sun is about ____ AU
5
Which of these substances could condense and form solid particles near the proto-sun
Metallic Compounds
All planets in the solar system have at least one moon
False
The more massive planets in our solar system tend to be less dense than the lower mass planets
True
Jovian planets have longer rotation periods than the terrestrial planets
False
All the planets orbit the Sun counterclockwise as viewed from above the earths North Pole
True
If a high tide occured in Halifax at 10:00 am then high tide tomorrow will be at about
10:50
The moon keeps the same side towards the earth because of
the tidal force exerted by the earth
If the moon were covered with water the number of tidal bulges would be
two
The Roche limit is
the critical distance from a planet inside which the tidal force on a satellite is sufficient to disrupt it
The rings of Saturn are inside the Roche limit for Saturn
True
Shepherd moons are
the moons near the edges of planetary rings
What is the Cassini division of Saturn's rings
A large gap visible from earth produced by an orbital resonance with the moon Mimas
All Jovian planets have rings
True
What mechanism is most responsible for generating the internal heat of Io that drives volcanic activity
tidal heating
The Gallilean satellites of Jupiter have synchronous rotation
True
What are greenhouse gases
Gases that absorb infrared light
Clouds, snow and ice have higher reflectivity than rock
True
Which of the following planets has the highest atmospheric pressure at the surface: Mercury, Venus, Earth, Mars
Venus
Saturn's atmosphere is mostly
Hydrogen
The atmosphere of Mars is mostly
Carbon Dioxide
Which of these planets has the lowest atmospheric pressure Venus, Earth, Mars
Mars
If there were no greenhouse effect on the earths atmosphere its average temperature would be
below the freezing point of water
Liquid water on earth dissolves carbon dioxide in Earths atmosphere
True
The diameter of the largest known asteroid is roughly
1000km
Most asteroids are located
in the asteroid belt
The fact that mars has no magnetic field that would shield it from the solar wind and cosmic rays is a contributing factor in explaining its thin atmosphere
True
The asteroid belt is located between the orbits of mars and jupiter
True
The Kirkwood gaps result from
regular gravitational pulls by Jupiter
C-asteroids composed of silicates mixed with dark carbon compounds are located primarily
at the outer edge of the asteroid belt
The asteroids with highly elliptical orbits are
Apollo asteroids
Where are the Trojan asteroids located
Along the orbit of Jupiter, 60 degrees ahead and behind jupiter
S-asteroids are located primarily
at the inner edge of the asteroid belt
The combined mass of all asteroids in the asteroid belt is
less than that of any terrestrial planet
S-asteroids have
a stony appearance
What do we call a small piece of solar system debris found on earth
Meteorite
The largest number of meteorites are
Stones
All asteroids have retrograde (clockwise) orbital motion as seen from far above the earth's north pole
False
The speed of a comet increases as it gets closer to the sun
True
Which of these planets has the largest diameter: Jupiter, Saturn, Uranus, Neptune
Jupiter
The impact craters have floors that are lower than the surrounding surface
True
Which of these planets has the smallest mass: Mercury, Venus, Earth, Mars
Mercury
The earth's inner core consists of
Solid iron and nickel
The active volcanoes on earth are often found near the boundary of two tectonic plates
True
On average, one observes more meteors before midnight
False
The numerous caters we see on solid surfaces on so many solar system bodies are evidence that
They were bombarded in their youth by many solid objects
When we see a meteor shower it means that
earth is crossing the orbit of a comet
What is the most abundant chemical element in Earth's atmosphere
Nitrogen
Which of these planets has the highest albedo (reflectivity): Mercury, Venus, Earth, Mars
Venus