Science: Chapter 7 Question Preview (ID: 43677)
Chapter 7 Review: Lessons 1-4.
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Which solar system object is the largest?
a) the Sun
b) Jupiter
c) Saturn
d) Mercury
Which planet is the smallest?
a) Mercury
b) Mars
c) Earth
d) Venus
Which best describes the asteroid belt?
a) millions of small rocky objects
b) another name of the Oort cloud
c) the region where comets originate
d) large chunks of gas, dust, and ice
Which describes a planet's speed as it orbits the Sun?
a) It increased then decreases
b) it constantly decreases
c) it constantly increases
d) it does not change
Which describes the greenhouse effect?
a) energy trapped by atmosphere
b) effect of gravity on temperature
c) energy emitted by the Sun
d) reflection of light from a planet
How are the terrestrial planets similar?
a) similar rocky surfaces
b) similar densities
c) similar diameters
d) similar periods of rotation
Which inner plannet is te hottest
a) Venus
b) Earth
c) Mars
d) Mercury
How does Earth differ from other inner planets?
a) its surface is covered by large amounts of liquid water
b) its atmosphere contains large amounts of methane
c) its period of revolution is much greater
d) its surface temperature is higher
Which two gases make up most of the outer planets?
a) hydrogen and helium
b) ammonia and helium
c) helium and methane
d) methane and hydrogen
Which is true of the dwarf planets?
a) spherically shaped
b) more massive than nearby objects
c) never have moons
d) orbit near the moon
Which is a bright streak of light in Earth's atmosphere?
a) meteor
b) meteroite
c) meteroid
d) comet
Which best describes an asteroid?
a) rocky
b) icy
c) wet
d) round
An astronomical unit is defined by
a) the distance Earth is from the Sun
b) the distance Mercury is from the Sun
c) 100 million kilometers
d) 150 million kilometers
a small, rocky particle that moves through space
a) meteroid
b) meteorite
c) meteor
d) impact crater
a meteroid that strikes a planet or moon
a) meteorite
b) meteroid
c) meteor
d) impact crater
a round depression formed on the surface of a planet, moon, or other space object
a) impact crater
b) meteor
c) meteorid
d) meteorite
The four largest moons of Jupiter- Io, Europa, Ganymede, and Callisto are known as
a) Galilean moons
b) Gas Giants
c) Dwarf moons
d) Astronomical Units
This occurs when a planet's atmosphere traps solar energy and causes the surface temperature to increase
a) greenhouse effect
b) greenhouse gases
c) water vapor
d) terrestrial planet
planets closest to the Sun, made of rock and metal, and have solid outer layers
a) terrestrial planets
b) gas giants
c) galilean moons
d) dwarf planets
the time it takes an object to travel once around the Sun
a) period of revolution
b) period of rotation
c) revolution
d) rotation
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