Show:
Magnetism
Electricity
Gravity
100
Magnetism is an example of a ___________ force.
Non contact
100
In an electric current, ____________ are moving from one point to another.
electrons
100
Define gravity.
The force of attraction between any two objects.
200
Magnets are able to push and pull objects without touching them because of the _____________.
Magnetic field
200
The electrons will flow from a _______________ charge to a ________________ charge.
Negative to positive
200
What two factors affect the strength of an object's gravity?
Mass and distance
300
If I hold two magnets together with the north poles of the magnets facing each other, what will happen?
They will repel each other.
300
Describe an electromagnet.
It is a magnet in which the magnetic field is only present when there is an electric current present, meaning you can turn it on and off.
300
Give one example of how gravity is similar to electricity and magnetism.
Answers will vary
400
How do we benefit from the earth's magnetic field?
It repels harmful particles from the sun (solar flares).
400
Explain how an electric generator works.
It transforms kinetic energy into electrical energy.
400
If everything has a gravitational pull on everything else, explain why we aren't stuck to everything all the time.
Gravity depends on mass and distance, and the gravity of one object must be great enough to create an unbalanced force in order for the objects to be affected.
500
Explain how a compass works.
Teacher will decide on acceptable answers.
500
Give one way that you can strengthen the force of your electromagnet?
Increase the number of coils around the nail.
500
Explain how the planets stay in orbit around the sun.
Teacher will decide what answers are acceptable