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WorksheetsSolar system motion
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
Kepler's first law states that the orbits of the planets around the sun are
a)
Circles
b)
Ellipses
c)
Spheres
d)
irregular shapes
2.
How does changing the mass of objects affect the force of gravity?
a)
Increasing mass will decrease gravity
b)
Decreasing mass will increase gravity
c)
Mass will not affect gravity
d)
Increasing mass increases gravity
3.
How does changing the distance between objects affect the force of gravity?
a)
Decreasing distance increases gravity
b)
increasing distance increases gravity
c)
Distance does not affect gravity
4.
What did Kepler say in his third law about the velocity of objects in large orbits and distances compared to smaller objects and distances?
a)
The velocity is faster in larger orbits
b)
The velocity is slower in larger orbits
c)
The velocity is constant no matter what size the orbit is
d)
There is no relationship between velocity and size of orbit
5.
The point in Earth's orbit when it is closest to the sun is called the
a)
Aphelion
b)
perihelion
c)
maximum ellipse
d)
minimum elipse
6.
The point in the Earth's orbit when it is furthest from the sun is called
a)
aphelion
b)
perihelion
c)
minimum ellipse
d)
maximum ellipse
7.
The Earth is moving slowest
a)
at its perihelion
b)
at its aphelion
c)
when perpendicular to the major axis
d)
during our winter
8.
The Earth is moving fastest in its orbit when it is
a)
winter
b)
at its perihelion
c)
at its aphelion
d)
when it is farthest away
9.
The amount of time it takes Earth to spin on its axis is called
a)
an hour
b)
a month
c)
a day
d)
a year
10.
The planet with the shortest year is
a)
Earth
b)
Neptune
c)
Pluto
d)
Mercury
11.
Why does the moon orbit the Earth and not the Sun?
a)
The Earth is bigger than the Sun
b)
The sun is too close to the moon
c)
The Earth is closer to the moon.
d)
The Sun did not exist when the moon formed
12.
When the distance between foci is increased, what happens to the shape of the ellipse?
a)
it gets rounder
b)
it gets flatter
c)
its major axis decreases
d)
its minor axis increases
13.
The rounder the ellipse, the ______________ the eccentricity
a)
lower
b)
higher
14.
How many laws of planetary motion did Kepler discover?
a)
1
b)
2
c)
3
d)
4
15.
Which scientist discovered the law of gravitational attraction?
a)
Kepler
b)
Brahe
c)
Galileo
d)
Newton
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