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WorksheetsUnit 9 Study Guide 23-24
Total questions: 16
Worksheet time: 1hrs 16mins
Two new planets are discovered, planet X and planet Y. The planets have identical volumes, but the mass of planet X is two times greater than the mass of planet Y. If two identical space ships land on each planet, which of the following will be true?
The mass of the space ship on planet X will be greater than the mass of the space ship on planet Y.
The weight of the space ship on planet X will be greater than the weight of the space ship on planet Y.
The mass of the space ship on planet Y will be greater than the mass of the space ship on planet X.
The weight of the space ship on planet Y will be greater than the weight of the space ship on planet X.
In which of the following diagrams would the gravitational attraction be the greatest?
Electric charges that are different (a) each other. What charge does an electron have? (b)
If a substance loses electrons so that it has more protons than electrons, what type of charge does it have? (c)
What will happen if you rub a balloon on a wool sweater?
Protons from the sweater will rub off on the balloon and the balloon will become negatively charged.
Electrons from the sweater will rub off on the balloon and the balloon will become negatively charged.
Electrons from the sweater will rub off on the balloon and the balloon will become positively charged.
Protons from the sweater will rub off on the balloon and the balloon will become positively charged.
Why do you build up a static charge when you rub your shoes across the carpet?
Protons rub off of the carpet and onto your shoes.
Electrons rub off of your shoes and onto the carpet
Protons rub off of your shoes and onto the carpet.
Electrons rub off of the carpet and onto your shoes
A positively charged rod is brought close to one end of a neutral metallic plate as seen below. What type of charge is induced on the right side of the plate?
negative
neutral
mixed charges
positive
A neutral electroscope is touched with a positively charged rod. After the rod is removed the electroscope is charged positively because of:
friction
conduction
induction
photoemission
Which of the following makes a good electrical insulator? Why?
Glass, copper and wood, because electrons move freely inside them.
Glass, because it is slippery and smooth.
Copper because it is metal
Glass, wood and plastic because electrons cannot move freely inside them
A conductor is a ______.
electric current
magnet
material that current cannot pass through easily
material that current can pass through easily
What kind of magnets repel each other? (check all that apply)
South pole to south pole
South pole to north pole
North pole to south pole
North pole to north pole
Where is the magnetic force the strongest on a magnet?
below the magnet
above the magnet
at the poles
in the middle
While electric current is flowing through a wire, what surrounds the wire?
protons
electrons
magnetic field
compass field
What is the difference between a bar magnet and an electromagnet? (check all that are true)
An electromagnet is a temporary magnet that is only magnetic when electricity is flowing through the wire.
A bar magnet is a permanent magnet that will keep its magnetism for a long time
A bar magnet will only stay a magnet if it is in contact with something metal.
An electromagnet is always stronger than a bar magnet.
What can you do to an electromagnet to make it stronger? (check all that are true)
decrease the number of coils wrapped around the iron core.
increase the number of batteries attached to the electromagnet.
increase the number of wire coils wrapped around the iron core
increase the strength of the batteries attached to the electromagnet.
How are magnets and electricity related?
Electricity can be used to make a magnet
Neither of these are true
Both of these are true
Magnets can be used to make electricity
What is the same about gravity, magnetism and electric charges? (check all that are true)
The more distance between the object, magnet or charges the weaker the force of attraction or repulsion.
The object, magnet or charge has to touch in order for the force to be felt.
Gravity, magnetism and electric charges are rare and don't affect our daily life very often.
Gravity, magnetism and electric charges can be classified as non-contact forces because they don't have to touch each other to feel a force.
