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Magnets
Test Description: UT 5th grade science standard 3
Instructions: Answer all questions to get your test result.
1) What must happen for an electromagnet to have a magnetic field?
A
It must be lined up wit Earth's magnetic field
B
It has to be touching another magnet
C
It must be connected to an electrical source
D
It must be heated
2) Sam was shown four objects, one of which did not contain a magnet. Which should be selected as the one that does NOT contain a magnet?
A
Television
B
Cassette recorder
C
Wind-up clock
D
Electric can opener
3) What substance is attracted to a magnet?
A
lead
B
iron
C
silver
D
water
4) What happens when two north poles of magnets are placed together?
A
the strength of the magnet is doubled
B
they attract
C
they repel
D
they cancel eachother out
5) What is our best evidence that Earth has a magnetic field?
A
wind blows from east to west
B
Earth's oceans all have currents
C
all things fall toward Earth's center
D
a compass needle lines up with it
6) Which of the following would be the best way to observe and compare the magnetic fields of various magnets?
A
use a reference book and read a section about electromagnetism and magnets
B
ask a high school science teacher about he history of natural magnets
C
search for an Internet web site to find experiments on electricity and magnets
D
conduct an experiment using different types of magnets and iron fillings
7) Earth's magnetic field and bar magnets both attract particles to the same location. Where are they?
A
the North and South poles
B
first to the middle, then to the ends
C
the middle
D
all around the outside
8) A circuit, coiled wire around an iron rod, and a switch are components of which of the following?
A
a permanent magnet
B
a natural magnet
C
an electromagnet
D
a magnetized paper clip
9) 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
can give a
D
fall faster than other objects when you drop them
10) The fact that a compass needle is designed to always point north tells us what?
A
there's too much static in the air
B
most compasses needed to be set
C
Earth is surrounded by a magnetic field
D
the solar rays affect magnetism
*select an answer for all questions
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