Forces, Newtons Laws, Momentum, Magnetism, Electromagnetism

A student wants to make an electromagnet. Which items are needed?

• magnet copper wire

• copper wire, metal nail, battery

• magnet, copper wire, metal nail

• battery, heat source, copper wire

The force of gravity pulls down on your house with a total force of 300,000 newtons. The force of gravity pulling down on your house would be exactly twice as much if your house:

• Had twice as much mass

• Was twice as tall

• Had twice as much volume

• Covered twice as much area

The sun’s mass is about 30 million times greater than the moon. Why does the gravitational pull between Earth and the moon affect Earth’s tides more than the gravitational pull between Earth and the sun?

• The moon is more dense than the sun.

• The moon has phases, but the sun does not.

• The moon orbits Earth, but the sun does not.

• The moon is closer to Earth than the sun.

A Maglev train is powered by magnetism and electricity. A student wants to build a model of this train. Which test will best determine if the model train works?

• Attach the train to an electric fan

• Connect the train to a solar panel

• Connect the train to an electromagnet

• Connect the train to a rocket

The attractive or repulsive force between objects is called _.

• magnetism

• velocity

• momentum

• Dr. Seay moving a chair

What creates Earth's magnetic field? Choose the best answer from the selections below.

• the hot, dense ball of solid iron at the Earth's inner core

• hot swirling iron at the Earth's outer core

• The north and south poles

• magnetic force

When gravity is the only force acting on an object, the object is said to be in____. Select the best answer from the choices below.

• Momentum

• Free fall

• Acceleration

• Deceleration

How can you turn off a magnetic field produced by an electrical current?

• By placing a material with strong magnetic properties inside the coil of a solenoid

• By making a loop or coil in the wire

• By increasing the current in the wire

• By turning the electrical current off

The image below represents what concept? _

• magnetic declination

• compass

• compass

• AMS Bears

Which surface has the least amount of friction?

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