# Midterm 1 - Quiz 1

12 Questions | Total Attempts: 37  Settings  This quiz was designed to simply go over every quiz question contained in quiz 1.

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• 1.
The distance from the Sun to each of the planets is often reported in AU where 1 AU is:
• A.

• B.

• C.

The radius of the Earth's orbit.

• D.

The radius of the solar system.

• E.

The distance to the nearest star(excluding the Sun).

• 2.
The orbits of the planets are NOT:
• A.

Almost perfect circles.

• B.

With the Sun at their centers.

• C.

Are almost parallel to one another(like sheets of paper on top of each other).

• D.

• E.

Suggestive of a common initial "origin"(or starting point) in the distant past.

• 3.
The planets orbit the Sun because:
• A.

The Sun is by far the most massive object in the solar system.

• B.

The force of gravity attracts the planets towards the Sun.

• C.

Planets are moving quickly(like NASA satellites that circle the Earth).

• D.

All of the above.

• E.

None of the above.

• 4.
Because the planets move in elliptical(slightly squashed circular) orbits the distance to the Sun is reported as:
• A.

The orbit semi-major axis (in AU)

• B.

The orbit major axis (in AU)

• C.

The orbit semi-minor (in AU)

• D.

The orbit minor axis (in AU)

• 5.
The (orbital) period of a planet is:
• A.

The time for one complete rotation of the planet(on its axis).

• B.

The time for one complete revolution of the planet around the Sun.

• C.

The ratio of the time for one complete rotation of the planet(on its axis) to the time for one complete rotation of the Earth on its axis.

• D.

The ratio of the time for one complete revolution of the planet around the Sun to the time for one complete revolution of the Earth around the Sun.

• E.

None of the above.

• 6.
The mass of a planet is determined using:
• A.

The size of the planet and an average density based on the expected composition(of the planet).

• B.

The size of the planet and the (universal) density of water.

• C.

Newton's laws of motion and gravity, combined ith the (orbital) period of the planet.

• D.

Newton's laws of motion and gravity, combined with the rotational period of the planet.

• E.

Newton's laws of motion and gravity, combined with the motion of the planet's moons (that orbit the planet).

• 7.
Which ordering of planets by INcreasing distance frm the Sun is NOT correct:
• A.

Mercury, Earth, Mars, Jupiter

• B.

Venus, Mars, Neptune, Uranus

• C.

Earth, Mars, Saturn, Neptune

• D.

Mercury, Venus, Mars, Saturn

• E.

Jupiter, Saturn, Uranus, Neptune

• 8.
What are the bodies between Mars and Jupiter (sometimes called the "failed planet"):
• A.

Kuiper belt objects

• B.

Ort cloud (objects)

• C.

The asteroids

• D.

The meteorites

• E.

The comet cloud (objects)

• 9.
Of all the planets, the Earth is UNIQUE in having:
• A.

An average density greater than water.

• B.

An atmosphere.

• C.

Substantial oxygen in its atmosphere and liquid water on its surface.

• D.

No rings.

• E.

A changing visual appearence as seen from space.

• 10.
The Earth has:
• A.

Fewer moons than Mercury.

• B.

Fewer moons than Venus.

• C.

Fewer moons than Jupiter.

• D.

More moons than Saturn.

• E.

More moons than Uranus.

• 11.
Viewed from the side (and at a great distance from the Sun) the planet orbits are:
• A.

Randomly oriented.

• B.

Lie almost in one plane.

• C.

Lie very close to the "ecliptic".

• D.

A and C

• E.

B and C

• 12.
Evidence that the planet orbits lie "almost in one plane" can be seen:
• A.

Only from an observer in the distant fringes of the solar system.

• B.

Never...as the planet orbits are randomly oriented.

• C.

Even from Earth...as a near linear alignment of the planets in the sky.

• D.

Even from Earth...but only using sophisticated mathematical models.