Gravity, Electricity, Magnet Review

What types of charges repel?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Neutral and Neutral

The closer the charges, the ___________ the force between them

• closer
• further
• stronger
• weaker

A balloon has a negative charge.  The glass rod has a positive charge.  What will happen when the glass rod is brought near the balloon?

• The balloon will be attracted to the rod
• The balloon will be repelled by the rod
• The balloon will remain in place
• The balloon will spin in circles

Which is NOT an insulator.

• Wool
• Plastic
• Copper
• Glass

Magnetism is a

• Force

• Power

• Form of Energy.

• Form of Electricity

The Sun has more gravity than the planets in our solar system because the Sun is

• hotter

• more massive

• made of plasma

• undergoing fusion

You can watch static electricity in action by rubbing an inflated balloon against your hair. Your hair will actually stand on its end! It does this because each hair becomes charged, and they all repel one another.

However, eventually, your hair will return to normal. Why is this?

• The charge accumulated in your hair eventually just disappears.

• The charge accumulated in your hair is eventually converted to neutral particles.

• The charge accumulated in your hair is eventually broken down by the nuclear force.

• The charge accumulated in your hair is eventually transferred to the surrounding environment.

There are three ways objects can become electrically charged. They are friction, induction and

• conduction

• Convection

• radiation

• polarization

The strength of gravity is affected by these factors. They are

• mass only

• mass and distance

• distance only

• mass and weight

How would a bar magnet orient itself relative to this planet’s magnetic field?

• A

• B

• C

• D