Transcript Magnetism Unit Warm

Magnetism Unit Warm-Up Day 1
1. Some things can be picked up by magnets. Some things cannot.
Which of the following things do you think can be picked up by a
magnet?
Cloth
Silver
Wood
Steel
Aluminum
Leather
Copper
Other magnets
Plastic
Iron
Glass
Tin
Pencil Lead
Paper
Mirror
2. Using complete sentences, explain your thinking. What rule or
reasoning did you use to decide if something can be picked up by a
magnet?
Magnetism Unit Closing Day 1
Two friends were testing a magnet at lunch. Their
magnet would not pick up an empty milk carton, but
it did pick up a metal fork. Here is what they said:
• Sebastian: The magnet picks up the fork because
the fork is made of metal. Anything made of
metal can be picked up by a magnet.
• Emilio: Sebastian, I disagree with you. I think only
some things made of metal can be picked up by a
magnet.
With whom do you agree the most? Explain why
you agree.
Magnetism Unit Warm-Up Day 2
A magnet is wrapped up with aluminum foil. The magnet
is completely covered by the foil. What do you predict
will happen when the magnet is held near a steel paper
clip? Write the sentence that best matches your thinking:
a) The paper clip will move toward the wrapped magnet.
b) The paper clip will move away from the wrapped
magnet.
c) The paper clip will not move either toward or away
from the magnet.
Using complete sentences, explain your thinking. What
rule or reasoning did you use to make your prediction?
Magnetism Unit Closing Day 2
Three friends are talking about magnets and
magnetic materials. They know that an iron nail
sticks to a magnet. However, they disagree about
the attraction. Here is what they said:
• Arthur: I think the magnet attracts the iron
nail.
• Olivia: I think the iron nail attracts the magnet.
• Cora: I think they attract each other.
With whom do you agree the most? Explain why
you agree.
Magnetism Unit Warm Up Day 3
Two friends are playing with a magnet. They
notice that a paper clip moved toward one end of
the magnet. They disagreed about what would
happen if they turned the magnet around and
held it near the paper clip. This is what they said:
• Charlotte: I think the paper clip will move
away from the other end of the magnet.
• Jerome: I think the paper clip will move
toward the other end of the magnet.
With whom do you agree the most? Explain why
you agree.
Magnetism Unit Closing Day 3
Three students were asked to draw what they thought would
happen to the magnet shown here if it were broken in half at
the center of its length. This is what they said:
• Sabrina: I think one magnet will have 2 N poles at the ends
and the other magnet will have 2 S poles at the end.
• Marcus: I think both magnets will have a N and a S pole at
each end.
• Lester: I think one magnet would have the N pole on one
end and the other would have the S pole on the end, but
the other ends of both magnets would have no poles.
With whom do you agree the most? Explain why you agree.
Magnetism Unit Warm-Up Day 4
Six friends are talking about what makes a magnet stick
to a refrigerator. Here is what they said:
• Joaquin: I think chemicals make it stick.
• Shantell: I think it has to do with gravity.
• Yarez: I think an unseen force is involved.
• Maura: I think it is because the magnet is charged.
• Bart: I think a type of energy is what makes it stick.
• Bernie: I think it’s only friction that makes it stick.
With whom do you agree the most? Explain why you
agree.
Magnetism Unit Closing Day 4
Nathan holds a magnet near a refrigerator and
lets go. The magnet sticks to the refrigerator. If
Nathan could see what is happening in the space
between the magnet and the refrigerator when
he holds the magnet near the refrigerator, what
might it look like?
1. Draw a picture to show what you think is happening between the
magnet and the refrigerator right before the magnet sticks to the
refrigerator. Use symbols or pictures to show the interaction
between the magnet and the refrigerator.
2. Explain your drawing. Include an explanation of the symbols or
pictures you used to show the interaction.
Magnetism Unit Warm-Up Day 5
1. Drawings are used to represent a magnetic field. Which of the following
statements are true about the representation of a magnetic field using
magnetic field lines??
a. They have direction
e. Lines form closed loops from pole to
pole.
i. The magnetic field is the same
strength along a single field line.
b. The lines cross each other.
f. Although not shown on diagrams, the
lines could continue inside the magnet.
j. Lines go from N pole to S pole outside
the magnet.
c. Lines closest together indicate where
the field is strongest.
g. Lines represent the path of moving
electrons.
k. Lines represent positive and negative
charges.
d. Lines can only be drawn for bar
magnets.
h. Lines outside the magnet are closer
together at the poles.
l. The lines can extend for distances very
far away from the magnet.
2. Using complete sentences, explain your thinking. What rule or reasoning did
you use to decide if something can be picked up by a magnet?
Magnetism Unit Closing Day 5
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Four friends observed the north pole of a bar magnet being held
near a suspended, positively charged sphere. They each had
different ideas about the interaction between the ball and the
magnet. Here is what they said:
• Adeline: The sphere will be attracted to the N pole of the
magnet.
• Claire: The sphere will be repelled by the N pole of the magnet.
• Brandon: The sphere will interact with the magnet if the pole is
switched so the S pole is facing the positive charges..
• Jerome: The magnet will neither attract nor repel the sphere.
With whom do you agree the most? Explain why you agree.