Astronomy 1P02 Second 50

50 terms by OscarWilde1854

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Brock University

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

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