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Chapter 15: The Solar System Flashcards | StudBud
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Chapter 15: The Solar System
Chapter 15: The Solar System
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1
Why is Venus the hottest inner planet?
It is the closest planet to the Sun.
Its atmosphere traps a lot of heat energy.
It is covered with liquid water.
2
The planet that has a sideways axis of rotation is
Neptune
Saturn
Uranus
Jupiter
3
Which shape describes a planet's orbit?
an ellipse
a straight line
a circle
4
Which object lost its designation as a planet in 2006 and is now classified as a dwarf planet?
Eris
Pluto
Ceres
5
How are the outer planets similar?
They have atmospheres that are mostly hydrogen.
They have solid surfaces.
They are about the same size.
6
The planets in the solar system are so far apart that scientists measure the distances between them in
astronomical units
miles
kilometers
7
All the outer planets are made mostly of
water ice.
gas and liquid around a solid core.
metal and rock.
8
The type of object at the center of the solar system is a
comet
period of revolution
period of rotation
star
9
Which planet has a moon larger than the planet Mercury?
Jupiter
Uranus
Saturn
10
The planet that has a Great Red Spot and at least 63 moons is
Uranus.
Saturn.
Jupiter.
Neptune.
11
What makes a depression formed when a meteorite hits Earth?
the Kuiper belt
an asteroid
an impact crater
12
Why is Venus hotter than Mercury?
Venus' surface is covered with lava.
Venus has a strong greenhouse effect.
Venus is closer to the Sun than Mercury is.
13
The time it takes an object to spin once is a
period of revolution
star
period of rotation
comet
14
Because Mercury's mass is so small, it
does not rotate.
has no atmosphere.
has a surface that is not solid.
15
An object made of gas, dust and ice is a(n)
star
comet
period of revolution
period of rotation
16
Earth is the only planet with a wide variety of life because of its
size and shape.
closeness to the Sun.
moderate temperature and liquid water.
17
The small, rocky particle that moves through space is a(n)
meteoroid
meteorite
meteor
18
Small, rocky objects that orbit the Sun between Mars and Jupiter are
asteroids
outer planets
inner planets
19
All the inner planets
have at least one moon.
are rocky and have a solid outer layer.
have thick atmospheres.
20
Which planet is the solar system's largest?
Jupiter
Saturn
Neptune
21
The outer planets have atmospheres composed mostly of
nitrogen and oxygen.
hydrogen and helium.
water vapor and carbon dioxide.
22
Comets form a glowing tail when
they cross the path of a glowing meteoroid.
they are at the farthest point in their orbit around the Sun.
the Sun's energy changes their ice into a gas and makes it glow.
23
An astronomical unit is the average distance
from Earth to the Sun.
from Earth to the Moon.
from Earth to Mars.
24
The time it takes an object to travel around the Sun is
comet
star
period of revolution
period of rotation
25
How is Venus unlike other planets?
It has a solid inner core.
Its period of rotation is longer than its period of revolution.
It has a very thin atmosphere.
26
Large spherical objects made primarily of the gases hydrogen and helium are
asteroids
outer planets
inner planets
27
The chunks of rock and ice that orbit the Sun between Mars and Jupiter are
impact craters.
asteroids.
the Kuiper belt.
28
Pluto was known as a planet but is now a(n)
meteoroid.
asteroid.
dwarf planet.
29
The source of short-period comets in the outer part of the solar system is
an asteroid.
the Kuiper belt.
an impact crater.
30
The planet with the most complex ring system is
Saturn.
Uranus.
Neptune.
Jupiter.
31
A spherical object orbiting the Sun that has objects of similar mass orbiting nearby is a
comet.
dwarf planet.
planet.
32
A small, rocky particle that strikes a planet or moon is a(n)
meteorite
meteoroid
meteor
33
What keeps planets in orbit around the Sun?
the Sun's period of rotation
the Sun's mass
the Sun's gravitational force
34
The planet with size, makeup and structure that are like that of Uranus is
Saturn
Jupiter
Uranus
Neptune
35
The Sun is a(n) _____________ at the center of the solar system.
star
astronomical unit
planet
36
Spherical objects made mainly of solid, rocky material are
outer planets
asteroids
inner planets
37
Which inner planet has the longest period of revolution and why?
Mercury, because it is closest to the Sun
Mars, because it is farthest from the Sun
Venus, because it spins very slowly
38
Why do scientists think that liquid water might have once existed on Mars?
The largest known mountain in the solar system is on Mars.
Mars' surface has deep gullies on it.
The southern half of Mars is covered with craters.
39
A streak of light made by a glowing rocky particle moving through Earth's atmosphere is a(n)
meteor
meteorite
meteoroid
40
An object that orbits the Sun, has a spherical shape, and has a mass greater than the mass of other objects near it is a
planet
star
asteroid
