Chapter 26
Compared with the age of the Sun, the age of the universe is A. about the same. B. slightly longer. C. Slightly shorter. D. more than double.
D. more than double.
The planet __________ has an abundant supply of liquid water that covers approximately 70% of its surface
Earth
The solar wind A. creates the tails of comets. B. powers the aurora borealis on Earth. C. is composed of high-speed electrons and protons. D. All of the above
D. All of the above
Asteroids are small rocky bodies that A. orbit the Sun. B. mainly reside between Mars and Jupiter. C. are smaller than Earth's Moon. D. All of the above.
D. All of the above.
Which of the following orbits around the Sun? A. Planets. B. Comets. C. Asteroids. D. All of the above.
D. All of the above.
Which is farthest from the Sun? A. Pluto. B. Asteroid Belt. C. Kuiper Belt. D. Oort Cloud.
D. Oort Cloud.
Strictly speaking, in every second that passes, the mass of the Sun A. decreases. B. remains constant. C. increases. D. reinvents itself.
A. decreases.
Rotation of the Sun is A. greater at the equator than in regions closer to the poles. B. less at the equator than in regions closer to the poles. C. in opposite directions on either side of its equator. D. a constant in the solar system.
A. greater at the equator than in regions closer to the poles.
Compared to the size of Earth, the Jovian planets are A. larger. B. smaller. C. a mixture of smaller and larger. D. more dense.
A. larger.
Asteroids are small rocky bodies that A. orbit the Sun. B. orbit around Jupiter. C. have eccentric orbits around Earth's Moon. D. All of the above.
A. orbit the Sun.
An __________ unit is the average distance between the Earth and the Sun.
Astronomical
Which of these makes contact with Earth's surface? A. Meteor. B. Meteorite. C. Meteoroid. D. None of the above.
B. Meteorite.
During the time of a new Moon, the A. Sun is between Earth and the Moon. B. Moon is between the Sun and Earth. C. Earth is between the Sun and the Moon. D. None of the above.
B. Moon is between the Sun and Earth.
The tails of comets point in a direction A. toward the Sun. B. away from the Sun. C. at nearly right angles to the Sun. D. None of the above.
B. away from the Sun.
Comets are composed mostly of A. iron. B. ice and rock. C. hydrogen and helium. D. silicon
B. ice and rock.
As a nebula shrinks under the influence of gravity, it A. spins slower. B. spins faster. C. loses its spin. D. spins into a protosun.
B. spins faster.
The present age of the Sun is about A. 7000 years. B. 100,000 years. C. 5 billion years. D. 10 billion years
C. 5 billion years.
The planet with the lowest density is A. Mars. B. Neptune. C. Saturn. D. Earth
C. Saturn.
Which planet has the most pronounced system of planetary rings? A. Mars. B. Jupiter. C. Saturn. D. Uranus.
C. Saturn.
Only one hemisphere of the Moon continually faces Earth, because the Moon A. doesn't rotate about an internal axis. B. experiences a torque when not aligned with the Earth's magnetic field. C. experiences a torque when not aligned with the Earth's gravitational field.
C. experiences a torque when not aligned with the Earth's gravitational field.
Pluto's status as a major planet is controversial, because A. its orbit is highly inclined compared with those of the planets. B. its composition doesn't match any of the other planets. C. it spends much of its time with comets in the Kuiper Belt. D. All of the above
D. All of the above
The energy source for the Sun or other stars is A. radiant energy. B. chemical energy. C. thermonuclear fusion. D. radioactivity.
C. thermonuclear fusion.
The Martian atmosphere is 95% _________________ with only about 0.15% oxygen.
Carbon Dioxide
The largest planet in our solar system is _________.
Jupiter
The asteroid belt lies between the planets ________ and Jupiter.
Mars
The __________ theory holds that the Sun and planets formed together from a cloud of gas.
Nebular
A __________ eclipse occurs when the Moon's shadow falls on Earth.
Solar
The moon __________ is the largest satellite of the planet Saturn.
Titan
The planet _________ has the hottest surface of any planet in the solar system.
Venus
How many moons does Earth have? a. 1 b. 2 c. 0 d. 3
a. 1
How many moons does Mars have? a. 2 b. 3 c. 4 d. 1
a. 2
The planet closest to the sun is: a. Mercury b. Venus c. Mars d. Earth
a. Mercury
Which theory holds that the Sun and planets formed together from a cloud of gas. a. Nebula b. Condensation c. Evolution d. Deposition e. Creation
a. Nebula
The planet that is closest to earth is size is: a. Neptune b. Venus c. Mars d. Mercury
b. Venus
What do we call an eclipse where the Earth's shadow falls on the Moon? a. Spring b. Solar c. Lunar d. Neap
c. Lunar
Which of the following orbits around the Sun? a. Asteroids. b. Planets. c. Comets. d. All of the above.
d. All of the above.
The largest moon in our solar system is: a. Luna b. Io c. Titan d. Ganymede
d. Ganymede