Ch 11 & 12 Astronomy Hw

The two jovian planets that contain the highest proportions of hydrogen compounds are

Uranus and Neptune

Which of the following statements best describes the general pattern of composition among the four jovian planets?

Uranus and Neptune contain relatively more rock and hydrogen compounds than Jupiter and Saturn

Astronomers believe that Jupiter's strong magnetic field is caused by

a huge layer of metallic hydrogen inside Jupiter

At their centers, all the jovian planets have cores made of

a solid mixture of rocky and icy materials under great pressure

Why does Neptune look blue?

methane in Neptune's atmosphere absorbs red light and reflect blue light

Match between the columns: 1. volcanoes currently erupting on its surface 2. ice-covered surface with few impact craters and subsurface ocean 3. The largest moon in the solar system 4. most distant from Jupiter of these four moons

1. Io 2. Europa 3. Ganymede 4. Callisto

Match the words at the left to the correct blanks in the sentences at right: 1. Scientists have detected lakes of liquid methane and ethane on the surface of 2. Jupiter has three moons for which there is evidence of a global, subsurface ocean of liquid water, with the strongest evidence favoring an ocean on 3. is the most volcanically active world in the solar system 4.Spacecraft images show fountains of ice spraying into space from Saturn's moon 5. The two moons that are larger than the planet Mercury are Titan and _______________which is also the largest of Jupiter's moons (and largest moon in the solar system)._____

1. Titan 2.Europe 3. Io 4. Enceladus 5. Ganymede

What is the minimum number of moons that must be orbiting a planet for the moons to have an orbital resonance?

2

Which of the following is NOT a correct statement about the ways the jovian planets differ from the terrestrial planets?

All the Jovians have satellites around them and none of the terrestrials do.

The moon that experiences the most tidal heating from Jupiter is

Io

why is Io more volcanically active than our moon?

Io has a different internal heat source.

What is unusual about Triton?

It orbits its planet backward.

Why is Jupiter denser than Saturn?

Its higher mass and gravity compress its interior.

The largest planet in the solar system (by mass) is _______

Jupiter

The tidal force that acts on Io is due primarily to the gravity of

Jupiter

Which of the jovian planets has the shortest period of rotation?

Jupiter

Which of the following statements about the seasons on Jupiter is correct?

Jupiter's axis is hardly tilted so it has no real seasonal variations

Which lists the jovian planets in order of increasing distance from the Sun?

Jupiter, Saturn, Uranus, Neptune

Which moon shows evidence of rainfall and erosion by some liquid substance?

Titan

In our solar system, the jovian planets are all farther from the Sun than are the terrestrial planets.

True

The planet that orbits "on its side" (i.e. has its rotation axis perpendicular to the plane of its orbit) is:

Uranus

Saturn's rings?

are continually supplied by impacts with small moons.

By far the most abundant element in the giant (jovian) planets is:

hydrogen

Which of the following characteristics distinguishes Uranus from every other planet in our solar system?

it rotates on an axis tilted almost 90 degrees to the circle of its orbit

Which of the following is NOT a way that Jupiter differs from terrestrial planets?

its surface has many more craters from early collisions

Which of the following does the composition of a planet like Jupiter resemble

the Sun

An orbital resonance occurs when one moon's orbital period is a simple fraction of the other's, such as 1/2 or 1/3 or 1/4. Correct!

true