Understanding Static Electricity

What happens when a ruler is rubbed on hair and brought near small paper pieces?

• The paper pieces fall to the ground.

• The paper pieces stick to the ruler.

• The paper pieces become hot.

• The paper pieces change color.

What is static electricity?

• Electricity that is stored in batteries.

• Electricity that flows continuously.

• Electricity that is at rest.

• Electricity that powers machines.

What is the smallest particle of an element that participates in chemical reactions?

• Molecule

• Atom

• Electron

• Proton

What is the charge of an atom that has more protons than electrons?

• Neutral

• Positive

• Negative

• Unstable

What is the charge of an atom with equal numbers of protons and electrons?

• Negative

• Neutral

• Unstable

• Positive

What happens when two objects with the same charge are brought close to each other?

• They explode.

• They repel each other.

• They attract each other.

• They become neutral.

What is Coulomb's law related to?

• The attraction and repulsion of electric charges.

• The flow of water.

• The speed of light.

• The growth of plants.

Why does a plastic ruler attract paper pieces after being rubbed on hair?

• The ruler gains extra electrons.

• The ruler heats up.

• The ruler becomes magnetic.

• The ruler changes color.

What causes the transfer of electrons between objects?

• Temperature

• Sound

• Light

• Friction

What happens to the electrons when a ruler is rubbed on hair?

• They move from the ruler to the hair.

• They move from the hair to the ruler.

• They disappear.

• They multiply.