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WorksheetsLaws of Motion Part 1
Total questions: 17
Worksheet time: 11mins
Reorder the following ellipses based upon eccentricity from lowest to highest.
Use the image to match the number with the variable.
1
a
2
F
3
b
4
c
5
C
Which point is a FOCUS?
A
B
C
D
E
An ellipse with a eccentricity of zero is a...
circle
oval
parabola
Which planet has the most eccentric orbit?
Earth
0.0167
Saturn
0.0541
Neptune
0.0086
Venus
0.0068
Why is it ok to model the planets orbits as circular?
Most of the orbits eccentricities are close to zero
Most of the orbits eccentricities are close to 1.
It is not ok to model the planets orbits as circular.
The planets orbits are actually elliptical.
Kepler's First Law states that planet orbits are...
ellipses
circular
heliocentric
geocentric
A heliocentric star system is one with the ____ in the center of the orbit.
Earth
Sun/Star
Focus
Vertex
The sun ____ the center of the major axis of the elliptical path of the celestial objects that orbit the sun.
is
is not
Why are Kepler's Laws about planetary motion accepted above all others that tried to explain the motions before him?
Some of the other scientists didn't make sense.
Kepler stated the paths are elliptical.
Kepler's ideas were supported by the observations.
Kepler is right.
Which has a more elliptical path?
comets
planets
According to Kepler's Second Law, where in it's path does a planet move the fastest?
At the perihelion
At the aphelion
At the top of the semi-minor axis
The speed is constant.
According to your investigation, the video, and Kepler's 2nd Law, the relationship between the area swept out in a fixed amount of time is ____.
greater
less
the same
What video?
In a circular orbit, the speed/velocity ___ change.
does
does not
where are you coming up with this information?
When a planet appears to move backwards, it is called...
impossible
retrograde motion
we never talked about this
an illusion
1 A.U. is equal to ~150 million ___
kilometers
miles
astronomical units
feet
Before Galileo people believed that if the Earth orbited the Sun the moon would be left behind. Which telescopic observation/discovery disproved that idea?
The finding of Jupiter's moons.
The discovery that planets are disks not spots of light.
Venus has phases like the moon.
The moon has topographic features.
