Warm-Up 03/18/2025

Which of the following scenarios best demonstrates the concept of static electricity due to an imbalance of charge?

• A metal spoon heating up in a pot of boiling water.

• A balloon sticking to a wall after being rubbed on hair.

• A light bulb glowing when connected to a battery.

• A magnet attracting iron filings.

Tags

VA.PS.9.a

Which material would most likely be used as an insulator in an electrical circuit?

• Copper

• Aluminum

• Rubber

• Silver

Tags

VA.PS.9.b

Explain how the law of electric charges applies when two balloons are rubbed with wool and then brought close to each other.

• They will attract each other because they have opposite charges.

• They will repel each other because they have like charges.

• They will neither attract nor repel each other.

• They will attract each other because they have like charges.

Tags

VA.PS.9.a

A student observes that a plastic rod becomes negatively charged after being rubbed with a cloth. What can be inferred about the cloth?

• The cloth gained electrons.

• The cloth lost electrons.

• The cloth gained protons.

• The cloth lost protons.

Tags

VA.PS.9.a

Which of the following best describes why metals are good conductors of electricity?

• Metals have tightly bound electrons.

• Metals have free electrons that can move easily.

• Metals have a high density.

• Metals have a high melting point.

Tags

VA.PS.9.b

A student is planning an experiment to test the conductive properties of different materials. Which of the following steps should be included in the planning process?

• Measure the mass of each material.

• Record the temperature of the room.

• Connect each material to a circuit and measure the current flow.

• Determine the color of each material.

Tags

VA.PS.9.b

What happens to the electric force between two charged objects as the distance between them increases?

• The electric force increases.

• The electric force decreases.

• The electric force remains the same.

• The electric force becomes zero.

Tags

VA.PS.9.a

A student claims that a glass rod is a good conductor of electricity. Which evidence would best refute this claim?

• Glass rods are often used in windows.

• Glass rods do not allow electricity to flow through them easily.

• Glass rods are transparent.

• Glass rods can be shaped into various forms.

Tags

VA.PS.9.b

Which of the following best describes an electric field?

• A region where a magnetic force is experienced.

• A region where an electric charge experiences a force.

• A region where gravitational force is experienced.

• A region where nuclear force is experienced.

Tags

VA.PS.9.a

Design an experiment to demonstrate the difference in conductive properties between a metal and a plastic. What would be a key observation?

• Both materials will conduct electricity equally well.

• The metal will conduct electricity, while the plastic will not.

• The plastic will conduct electricity, while the metal will not.

• Neither material will conduct electricity.

Tags

VA.PS.9.b