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Orbits, Density, and Planets

Total questions: 22

Worksheet time: 22mins

Name
Class
Date
1.
The closer a planet is to its host star: 
a)
the shorter the orbital period.
b)
the longer the semi-major axis.
c)
the colder the temperature.
d)
the more eccentric the orbit.
2.
Which of the following would increase the force of gravity on a planet?
a)
Decreasing the mass of the star.
b)
Decreasing the distance between the planet and star.
c)
Decreasing the mass of the planet.
d)
All of the above.
3.
The larger the star, the __________________ the habitable zone.
a)
larger
b)
smaller
c)
closer to the star
d)
further away from the star
4.
An exoplanet is:
a)
a planet that is about to supernova.
b)
any planet outside of our Solar System.
c)
too small to be a regular planet - like Pluto :(
d)
usually very similar to Earth.
5.
Within its orbit, as the planet gets closer to its host star:
a)
the planet speeds up.
b)
the force of gravity on the planet increases.
c)
the temperature of the planet increases.
d)
all of the above.
6.

How do the orbits of the outer planets compare to the inner planets?

a)

The outer planets have shorter orbits because their rotations are shorter.

b)

The inner planets have shorter orbits because their rotations are shorter.

c)

The outer planets have longer orbits because they are farther from the sun.

d)

The inner planets have longer orbits because their orbits are ellipses.

7.

Which are the terrestrial or rocky planets?

a)

Venus, Earth, Mercury, Mars

b)

Mercury, Venus, Earth, Jupiter

c)

Mercury, Venus, Mars, Saturn

d)

Venus, Mars, Earth, Saturn

8.

Planets that are closest to the Sun are identified as

a)

low-density jovian planets

b)

low-density terrestrial planets

c)

high-density jovian planets

d)

high-density terrestrial planets

9.
A student knows the mass of an object. What other variable does the student need to know to calculate the object's density?
a)
Color
b)
Weight
c)
Volume
d)
Length
10.
I have two objects with the same volume but different masses.  Which object will be more dense?
a)
The object with less weight.
b)
The object with more weight.
c)
The object with more mass.
d)
The object with less mass.
11.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
12.
Density is...
a)
the amount of mass in an object
b)
the amount of space an object takes up
c)
the amount of mass in a given space
d)
the weight of an object
13.
Why do ice cubes float in a  glass of water?
a)
the ice cubes are more dense than the water
b)
the water is more dense than the ice cubes
c)
the water is more dense than the glass
d)
the ice is more dense than the glass
14.
Which property of matter is determined by dividing its mass by its volume?
a)
elasticity
b)
buoyancy
c)
density
d)
viscosity
15.
A brick sinks in water while a wooden block of the same size floats.  This is because the brick has a
a)
lower volume than the wooden block
b)
lower density than the wooden block
c)
higher volume than the wooden block
d)
higher density than the wooden block
16.
Why do some substances float on water?
a)
they are warmer than water
b)
they are cooler than water
c)
they are more dense than water
d)
they are less dense than water
17.
Which box has a higher density?  
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
18.
Gravity pulls everything toward...
a)
The ground
b)
The center of mass
c)
The moon
d)
The Sun
19.

Without gravity, the stars, planets and all objects in the universe would _______.

a)

continue to orbit each other

b)

move in a random direction

c)

move in a straight line

d)

stop moving

20.

A(n) _____ is the curved path of an object around a point/object in space.

a)

orbit

b)

rotation

c)

revolution

d)

phase

21.

Smaller values for eccentricity describe...

a)

more circular ellipses.

b)

"flatter" ellipses.

22.

The orbits of the planets in our solar system are mostly circular.

a)

True

b)

False

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