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Opposite charges

• attract

• repel

• become neutral

• do nothing

Mr. Anady rubbed two balloons against his wool sweater for 30 seconds each. What will happen when the balloons are brought near each other?

• The balloons will repel each other.

• The balloons will attract each other.

• The balloons will become positively (+) charged.

• The balloons will pop.

What can happen when you touch a metal doorknob after rubbing your shoes on the carpet?

• The doorknob sends a burst of electric current into your body

• Millions of electrons go from your finger into the doorknob

• Our negatively charged body becomes positively charged

• Our finger becomes negatively charged

Which of the following is caused by static electricity?

• a stove getting hot when it is turned on
• a magnet being attracted to a refrigerator
• a lightning strike during a storm
• a light bulb coming on when a switch is turned on

The girl's hair and the comb are attracting  one another.  The hair and the comb have

• opposite charges
• like charges

A plastic rod is rubbed with a dry piece of cloth and the rod becomes positively charged.  The rod has …  

• gained electrons
• lost electrons
• gained protons
• lost protons

If an atom has 3 protons (+++) and 4 electrons (- - - -), it has a net charge of_____.

• -1
• +1
• 0
• 7

Why can you get a shock if you touch a metal doorknob after walking across a wool carpet?

• You have gained electrons; the doorknob has no electrons.

• You have gained neutrons; the doorknob has fewer electrons.

• You have lost electrons; the doorknob has many electrons.

• You have gained electrons; the doorknob has many electrons.

Static electricity is:

• electricity flowing in a wire
• the buildup of electric charges on an object
• when protons move between objects

If two objects with static charge are attracted, what do you know about them?

• They are both positively charged.
• They are both negatively charged.
• One is positively charged and one is negatively charged, but you won't be able to tell which is which.
• One is positively charged and one is negatively charged, and you can tell which is which by looking at them.