Transcript Millionaire_Magnetism

Who Wants
to be a
Millionaire ?
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$1,000,000
$ 500,000
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$
250,000
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10
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$
$
125,000
64,000
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8
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$
$
32,000
16,000
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$
$
$
$
8,000
4,000
2,000
1,000
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$
500
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$
300
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$
200
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$
100
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Ancient people discovered magnetic rocks
called lodestone. What did they use them
for?
A
C
To start fires
sculptures
B
D
Compasses
telephone receivers
Compasses
Sam was shown four objects, one of which
did not contain a magnet. Which should he
select as the one that does NOT contain
a magnet?
A
C
Wind – up clock
Electric can opener
B
television
D
Cassette recorder
Wind – up
clock
Ancient Greeks thought that magnetite was
a rock with magical properties; 73 hundreds
of years later, sailors used magnetite to find
directions. Today scientists have learned
to make magnets. Which sentence best
explains how we learn science?
A Ancient scientists did not know
a lot about magnets
C
We learn about science by
reading what others did,
then doing more
Magic is also a part of science if
you understand it properly
B
D
We learn much more about
science by just doing our
own experiments
We learn about science
by reading what others did,
then doing more
Which correctly shows an electromagnet
being used in today’s society?
A
C
A compass pointing the
correct direction
A cupboard door
staying closed
B
A crane lifting then
dropping
a metal car
D
A magnetic bracelet being
used for healing
A crane lifting then
dropping a metal car
What characteristics do
magnetic substances have? They
A
can push or pull objects they
are not touching
B
are always black and
cold to touch
C
fall faster than other objects
when you drop them
D
can give a “shock” when you
touch them
can push or pull
objects they
are not touching
A circuit, coiled wire around an iron rod, and
a switch are components of which of the
following?
A
An electromagnet
B
C
A natural magnet
D A magnetized paper clip
A permanent magnet
An electromagnet
Keisha was making an electromagnet in
class and wondered if it mattered how
many times the wire was twisted around
the nail. What would be the BEST
way for her to find
out?
A
C
Try using the electromagnet
with 20, 30, then 40
twists
Look at someone else’s
electromagnet to see
what was used
B
Try using one battery, then
adding another battery
D
Ask the teacher to find the
correct answer
Try using the
electromagnet
with 20, 30, then 40
twists
What substance is attracted
to a magnet?
A
silver
B
lead
C
water
D
iron
iron
Which correctly shows an example of how
magnets can help at home?
A
C
Separating aluminum cans
from glass
A crane lifting a car to be
crushed
B
Lifting, then dropping metal
washers.
D Closing a refrigerator door
Closing a
refrigerator door
What happens when two north poles
of magnets are placed together?
A They repel each other
C
They cancel each other
out
B They attract each other
D
The strength of the magnet
is doubled
They repel each
other
A student wanted to make a compass.
Which would be the best book to find this
information?
A Static and Current Electricity
B Magnets and Magnetism
C
D
All About the Earth
Maps of North America
Magnets and
Magnetism
After reading about ancient explorers using
a rock called magnetite to build a type of
compass, Cosby wondered whether this
was really possible. What would be the best
way for Cosby to find out if a rock could
be used in a compass?
A
Search the internet about the
history of magnetite
B
Try to build a compass using a
piece of magnetite
C
Ask his science teacher if there
is a rock that’s magnetic
D
Decide the book was really
mixing up myth for truth
Try to build a
compass using a
piece of magnetite
During a science activity, Lee noticed
when you place a strong magnet near a
compass, the compass’s needle lined
itself with the magnet, opposite poles together.
He also noticed that when he moved the magnet
around the compass, the needle followed the magnet. How
could Lee’s observation with a magnet and a compass
relate to Earth’s magnetic field?
A
C
Earth itself is a
giant magnet
Magnets will mess up
a compass
B
The compass’s needle
is weak
D
Earth’s gravity affects
magnetism
Earth itself is a
giant magnet
A student compared a bar magnet to a
horseshoe magnet by sprinkling bits of iron
around them. From his experiment, predict
which part of the magnet is the strongest.
A
The north and south
poles
B The middle of the magnet
C
Only the North poles
D
Only the South poles
The North and
South poles
How is Earth’s magnetic field
similar to that of a
magnet?
A
C
It has a North and South
pole
It is made in Earth’s core
B It is hundreds of miles long
D It is shaped like a horseshoe
It has a North
and South pole