Share Energy and Magnetic Forces
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Is gravity a contact or non-contact force?
Non-contact
How many poles does a magnet have?
Two
Same poles of a magnet attract or repel?
Repel
What are the two ends of a magnet?
North pole and south pole.
Opposite poles of a magnet attract or repel?
attract
True or false: a compass uses magnets.
true
What is a magnetic field?
The area around a magnet that attracts objects to the magnet.
Is magnetism a push or pull force or both?
both
True or False: a force applied to an object ALWAYS changes the object it acts on.
False
Is magnetism a contact or non-contact force? Why?
Non-contact because it moves an object without touching it.
When you sprinkle iron shavings around a magnet what does it reveal?
It reveals a magnetic field.
What does the magnetosphere protect the earth from?
Solar winds (Harmful rays from the sun)
What does maglev use to move a train forward?
Magnets
What is thermal energy?
Energy that produces heat
What machine in hospitals uses magnets?
Magnetic Resonance Imaging (MRI) Machine
Do electrons have a positive or negative charge?
Negative
