Chapter 15 Questions

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The mass of the Sun is how much than all of the other planets, moons, asteroids, and other bodies in the solar system?

700 times larger

What separates the terrestrial planets from the giant planets?

Asteroid belt

Callisto, Europa, Ganymede, and Io are

Galilean moons

Which of the following is most likely found in Jupiter?

Hydrogen

What is the largest planet in our solar system?

Jupiter

which of the following planets probably still has its original atmosphere?

Jupiter

A day on which planet is longer than a year on that planet?

Mars

The planet that has the shortest "year" among the eight planets is

Mercury

The planet that is not a giant is

Mercury

The planet that was named after the mythical Roman messenger of speed is

Mercury

What is the outermost planet?

Neptune

Which two objects are farthest apart?

Neptune and Uranus

Area of the solar system where long-period comets originate is the

Oort Cloud

The planet with the lowest average density, which is less than that of liquid water, is

Saturn

The only moon in the solar system with a substantial atmosphere is

Titan

How many moons orbit Mars?

Two

Which of the following planets would be mostly composed of hydrogen, helium, and methane and have a density of less than 2 g/cm^3?

Uranus

The "sister" planet to Earth is

Venus

On venus, the sun rises in the west. This is so because

Venus rotates in the opposite direction of its orbit

The distance from Earth to the Sun is called a (an)

astronomical unit

The belt of asteroids between Mars and Jupiter is probably

clumps of matter that condensed from the accretion disk but never got together as a planet

The small body with a composition and structure closest to the materials that condensed from the accretion disk is a (an)

comet

Saturns rings are thought to be

composed of thousands of particles of various sizes

Venus "shines" because it is

covered with clouds that reflect sunlight

The Great Red Spot is thought to be

high pressure region with high cold clouds

Planets in our solar system are classified according to all of the following characteristics except

inhabitants

Meteorites are classified into all of the following groups except..?

lead

Short period comets have orbital periods of

less than 200 years

A shooting star is a (an)

meteor

A small body from space that falls on the surface of Earth is a

meteorite

Remnants of comets and asteroids found in space are called

meteoroids

The most widely accepted theory on the origin of the solar system is

protoplanet nebular

Jupiter radiates twice as much energy as it receives from the Sun because of

slow gravitational compression of the planet

What type of planet are Mercury, Venus, earth, and mars?

terrestrial planets


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