Question 1

Which of the following moons has an atmosphere?

Accepted Answer

A)   Triton.
B)   Ganymede.
C)   Callisto.
D)   Titan. D

Question 2

The most widely accepted theory for the formation of the Moon is the

Accepted Answer

A)   Giant impact model, in which material was ripped from the Earth after an impact with a Mars size object.
B)   Fission model, in which the Moon was spun off of a rapidly rotating Earth.
C)   Co-formation model, in which the Moon formed from a rotating disk of gas and dust around the Earth.
D)   Capture model, in which the Moon formed in another part of the solar system and was captured by Earth's gravitational field. A

Question 3

If the Earth had a 90 degree tilt rather than a 23.5 degree tilt, how many seasons would there be?

Accepted Answer

A)   One (little to no seasonal variation) .
B)   Three (Winter, Spring, Summer) .
C)   Two (Winter, Summer) .
D)   Four (Winter, Spring, Summer, Fall) . D

Question 4

Icy comets that were originally orbiting in the inner part of the solar system could have met which of several fates?

Accepted Answer

A)   Collision with a planet or planetesimal.
B)   The loss of their icy constituents due to volatization.
C)   Being swept to the outer part of the solar system by a strong solar wind.
D)   All of the above.

Question 5

The main factors that influenced the evolution of the terrestrial planets shortly after their formation were impact cratering, volcanism, proximity to the Sun, and absence or presence of a biosphere.

Accepted Answer

A) True 
 B)False

Question 6

The planets orbit the Sun on or close to

Accepted Answer

A)   The equatorial plane.
B)   The galactic plane.
C)   The plane of the ecliptic.

Question 7

The __________ provides a "guesstimate" to the number of civilizations in our galaxy.

Accepted Answer

The answer of The __________ provides a "guesstimate" to the...

Question 8

What supports and sustains almost all life on Earth?

Accepted Answer

A)   Carbon dioxide.
B)   Radioactive decay from the Earth's core.
C)   Sunlight.
D)   Gravitational forces.

Question 9

Earth's Moon is approximately _________ the size of Earth.

Accepted Answer

The answer of Earth's Moon is approximately _________ the size...

Question 10

Which is the smallest planet in the solar system?

Accepted Answer

A)   Earth.
B)   Mars.
C)   Venus.
D)   Mercury.

Question 11

The nebular hypothesis proposes that the solar system formed from a huge, swirling cloud of cosmic gas and dust.

Accepted Answer

A) True 
 B)False

Question 12

Numerical age is the actual time when a specific event happened.

Accepted Answer

A) True 
 B)False

Question 13

How far away is the Earth from the Sun?

Accepted Answer

A)   1 Astronomical Unit.
B)   2 Astronomical Units.
C)   3 Astronomical Units.
D)   4 Astronomical Units.

Question 14

The atmospheres of the Jovian planets are composed mainly of __________ and helium.

Accepted Answer

The answer of The atmospheres of the Jovian planets are...

Question 15

With only a few exceptions, __________ is the source of energy that sustains life on Earth.

Accepted Answer

The answer of With only a few exceptions, __________ is...

Question 16

We experience seasons due to the extreme changes of Earth's orbit around the Sun.

Accepted Answer

A) True 
 B)False

Question 17

Our solar system is part of the Milky Way Galaxy. About how many galaxies do astronomers believe exist?

Accepted Answer

A)   50 billion.
B)   100 billion.
C)   200 billion.
D)   150 billion.

Question 18

Radiometric dating is possible if a rock contains a measureable amount of

Accepted Answer

A)   Parent isotopes.
B)   Parent and daughter isotopes.
C)   Daughter isotopes.
D)   Parent or daughter isotopes.

Question 19

The solar system is comprised of eight planets. All of the planets (other than Mercury and Venus) have one or more moons. How many moons have been observed?

Accepted Answer

A)   8 known moons.
B)   200 known moons.
C)   10 known moons.
D)   170 known moons.

Question 20

The length of a stars life is primarily determined by its __________ .

Accepted Answer

The answer of The length of a stars life is...

Exam 4: Space and Time

Which of the following moons has an atmosphere?

The most widely accepted theory for the formation of the Moon is the

If the Earth had a 90 degree tilt rather than a 23.5 degree tilt, how many seasons would there be?

Icy comets that were originally orbiting in the inner part of the solar system could have met which of several fates?

The main factors that influenced the evolution of the terrestrial planets shortly after their formation were impact cratering, volcanism, proximity to the Sun, and absence or presence of a biosphere.

The planets orbit the Sun on or close to

The __________ provides a "guesstimate" to the number of civilizations in our galaxy.

What supports and sustains almost all life on Earth?

Earth's Moon is approximately _________ the size of Earth.

Which is the smallest planet in the solar system?

The nebular hypothesis proposes that the solar system formed from a huge, swirling cloud of cosmic gas and dust.

Numerical age is the actual time when a specific event happened.

How far away is the Earth from the Sun?

The atmospheres of the Jovian planets are composed mainly of __________ and helium.

With only a few exceptions, __________ is the source of energy that sustains life on Earth.

We experience seasons due to the extreme changes of Earth's orbit around the Sun.

Our solar system is part of the Milky Way Galaxy. About how many galaxies do astronomers believe exist?

Radiometric dating is possible if a rock contains a measureable amount of

The solar system is comprised of eight planets. All of the planets (other than Mercury and Venus) have one or more moons. How many moons have been observed?

The length of a stars life is primarily determined by its __________ .