Motion, Forces, and Energy Unit 3 Test

Protons and Electrons balance the charge of an atom.

• True
• False

Electric charges that are different _______ each other.

• Attract
• Repel

What charge does a proton have?

• negative (-)
• positive (+)
• neutral or no charge (0)

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

Which of these is the electron?

• A

• B

• C

Plastic is an example of _______.

• an insulator
• a conductor

The push or pull between charged objects is an

• electric force
• electric discharge
• electric field

True or False, Lighting is a form of static electricity.

• True
• False

What happens 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
• The doorknob sends millions of electrons into your finger
• our finger becomes negatively charged

The Electric Force is strongest when charges are...

• close together
• far apart
• the electric force is constant everywhere

Tags

NGSS.HS-PS2-4