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WorksheetsCh 27.2 Models of the Solar System
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
The early oceans became salty when
a)
dissolved solids were carried from land into the oceans.
b)
salt dropped from the atmosphere into the oceans
c)
sea creatures left salty deposits in their remains.
2.
About 99% of all matter contained in the solar nebula now exists in
a)
planets.
b)
asteroids.
c)
space
d)
the sun
3.
Which of the following do scientists NOT consider a major planet?
a)
Saturn
b)
Neptune
c)
Earth
d)
Pluto
4.
Small bodies that orbit planets are called
a)
planetesimals
b)
protoplanets
c)
moons
d)
comets
5.
When early Earth’s atmosphere formed, which of the following gases were lost because Earth’s gravity was too weak?
a)
oxygen and helium
b)
helium and nitrogen
c)
helium and hydrogen
d)
hydrogen and ozone
6.
Who believed that planets moved in epicycles as they revolved in larger circles around Earth?
a)
Aristotle
b)
Newton
c)
Ptolemy
d)
Copernicus
7.
The relationship between the average distance of a planet from the sun and the planet’s orbital period is described by the
a)
law of equal areas
b)
law of motion
c)
law of ellipses
d)
law of periods
8.
Which of the following laws describes the speed at which objects travel at different points in their orbits?
a)
law of equal areas
b)
law of eccentricity
c)
law of ellipses
d)
law of periods
9.
The law that describes how a planet orbits the sun is called the scribed by the
a)
law of orbital periods
b)
law of ellipses
c)
law of equal areas
10.
The degree of elongation of an elliptical orbit
a)
gravity
b)
orbital period
c)
eccentricity
11.
The time required for a body to complete a single orbit
a)
gravity
b)
inertia
c)
orbital period
d)
retrograde motion
12.
A pattern that makes it appear as though planets are moving backward in the sky
a)
retrograde motion
b)
inertia
c)
gravity
d)
orbital period
13.
The force that exists between any two bodies in the universe
a)
inertia
b)
gravity
c)
eccentricity
d)
pluto
14.
The tendency of a stationary body to remain at rest unless acted upon by an outside source
a)
gravity
b)
inertia
c)
retrograde motion
d)
eccentricity
15.
The process that caused early Earth to form three distinct layers
a)
protoplanet
b)
differentiation
c)
outgassing
d)
Pluto
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