Online Assessment
Instructions
1) Type in your first and last name in the
“Name” box in the top-left corner.
2) Next type in your teacher’s name in
the “ID” box.
3) Then type in your school’s full name in the
“Email” box.
4) Select the best answer for each question.
5) When you
are finished click the “Grade and Submit” button.
6) The grade will be emailed
to your teacher.
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1.
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NOTE: This assessment is only for Mr.
Elliott’s students.
---If you are not one of Mr. Elliott’s students then please go
back to the website and click on the link for other teachers. Thanks!
Horseshoe
Magnet | .
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Look at the
permanent magnet shown above
Why is the magnet shown
above NOT a good model for Earth’s magnetic field?
a. | Unlike this horseshoe magnet, Earth’s poles are at
opposite ends like a bar magnet. | b. | The Earth’s
geographic poles are the on the equator like a bar magnet | c. | The Earth’s magnetic poles are on the equator like an
electromagnet. | d. | The Earth’s
magnetic poles are on the bottom of the planet like a horseshoe
magnet. |
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2.
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This representation of Earth is good evidence that our planet has
...?a. | an atmosphere | c. | a
magnetic field | b. | gravity | d. | organic compounds |
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3.
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Earth’s Magnetic
Poles | A Compass | .
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You can use a compass
to navigate, and a compass is essentially a thin bar magnet that is able to spin.
Why does the north pole of a compass point towards
the geographic north pole of our planet? a. | Because with magnetic poles, opposites
attract. | b. | Because the domains of the bar magnet are aligned
creating a gravitation field | c. | Because with
magnetic poles, like poles repulse one another. | d. | Because the
geographic pole changes every 10, 000 years |
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4.
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Permanent
Magnet | Electromagnet | | | | |
Permanent magnets and electromagnets have
invisible magnetic fields around them.
Which statement best compares a permanent magnet and an
electromagnet? a. | A permanent magnet requires
an external source of energy, but an electromagnet produces its own
energy. | b. | The magnetic field lines from a permanent magnet emerge from the north pole,
but they emerge from the south pole of the electromagnet. | c. | A permanent magnet has a fixed magnetic field
strength but the magnetic field strength of an electromagnet can be
changed. | d. | A permanent magnet has a north pole and a south pole, but an electromagnet only
has a south pole. |
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5.
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Regardless of the shape, all magnets have a north
pole and a south pole. This is called polarity.
Which magnet below is the best example
of the magnetic poles of our planet?
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6.
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Illustration A | t
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Examine the apparatus shown in the
illustration above containing two circular magnets.
Notice that magnet A is levitating above
magnet B due to magnetic force.
Which of the following statements correctly describes
what is happening in this diagram?a. | Neither of these circular magnets have poles. This
explains why magnet A is levitating. | b. | The polarity at
the top of magnet B is the same as the polarity at the bottom of magnet A. | c. | The bottom of magnet A is a north pole, and the bottom of magnet B is also a
north pole. | d. | The polarity of
the top of magnet B is the opposite polarity of the bottom of magnet
A. |
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7.
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Magnets exert force on other magnets. (Opposites
attract and like repels)
Which set of magnets correctly demonstrates the attraction of unlike
poles?
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8.
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Hoverboard Skatepark | t
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Trevor and Jaxson used their knowledge of
magnetic fields to design and build a hoverboard park.
They embedded thousands of bar magnets
into the surface of the floor with the north poles facing up.
What would the polarity of the
bottom of the hoverboard have to be in order to levitate the board?a. | The hoverboard would not need any polarity as long as it
was made of aluminum. | b. | The bottom of the
hoverboard would have to be a south pole. | c. | Instead of
magnets, they could simply mount wheels on the board. | d. | The bottom of the hoverboard would have to be a north pole.
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9.
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Magnets exert force on other magnets. (Opposites
attract and like repels)
Which set of horseshoe magnets shown below correctly displays magnetic
attraction?
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10.
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Examine the diagram
displayed above.
Select the answer that correctly describes the phenomena that is illustrated
in this diagram.a. | The Earth’s magnetic poles are switching which
occurs every thousand years or so. | b. | This diagram is
demonstrating that opposite poles attract and that like poles repel. | c. | A powerful planet-wide electromagnet is being used to pull the Earth closer to
the sun. | d. | Charged particles in the solar wind are impacting
Earth’s magnetic field. |
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