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Worksheetscomets
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Unlike asteroids, which are mostly rock, comets are a more balanced mixture of _____
a)
metal and ice
b)
rock and metal
c)
ice and rock
d)
rock and minerals
2.
As comets progress through their elliptical orbits, they are heated mostly by _____
a)
the Sun
b)
friction
c)
internal molten metals
d)
convection of gases
3.
The process of ice turning directly into a gas is called _____
a)
fusion
b)
convection
c)
sublimation
d)
evaporation
4.
In the past, because comets look fuzzy, they’ve been called _____
a)
“hairy stars”
b)
“hairy eyeballs”
c)
“shooting stars”
d)
“fuzzy navels”
5.
The solid part of a comet is called the _____
a)
core
b)
kernal
c)
nucleus
d)
coma
6.
What is the gaseous cloud around a comet called?
a)
aura
b)
coma
c)
wisp
d)
haze
7.
When gas molecules emitted by a comet lose electrons, they are said to be _____
a)
dissociated
b)
ionized
c)
fissioned
d)
magnetized
8.
The “ion tail”, produced by the solar wind acting on ionized gas, points _____
a)
towards the sun
b)
away from the Sun
c)
behind the comet in its orbit
d)
ahead of the comet in its orbit
9.
The dust stream from a comet points _____
a)
towards the sun
b)
away from the Sun
c)
behind the comet in its orbit
d)
ahead of the comet in its orbit
10.
Short-period comets are defined as comets with an orbital period less than _____
a)
2 years
b)
20 years
c)
200 years
d)
2,000 years
11.
What are comets made of?
a)
Metals like iron and nickel
b)
Gas
c)
Hydrogen Gas
d)
Ice and rock
12.
The orbit of comets is which shape?
a)
Circular
b)
Elliptical/Oval
c)
Comets do not orbit the Sun
13.
Where do most comets come from?
a)
In the Kuiper Belt & Oort Cloud beyond Neptune's orbit
b)
In the Asteroid Belt between Mars and Jupiter
c)
Near the Sun
d)
Earth's atmosphere
14.
In the diagram, a comet's tail always points where?
a)
Towards the Sun
b)
Away from the Sun
c)
Towards Earth
d)
Away from Earth
15.
Sometimes I am called a "dirty snowball."
a)
Asteroid
b)
Star
c)
Meteor
d)
Comet
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