Objects move differently across different surfaces due to a force called _______.

• Friction

• Gravity

• Magnetism

• Buoyancy

Which of the following forces require no contact?

• Friction

• Magnetism

• Both A and B

• None of the above

Describe magnets as having _______ poles.

• two

• three

• four

• five

Predict whether two magnets will attract or repel each other, depending on which poles are facing.

• Like poles repel, unlike poles attract.

• Like poles attract, unlike poles repel.

• All poles attract each other.

• All poles repel each other.

What will happen to the iron filings when placed near/around the magnet?

• The iron filings will align themselves along the magnetic field lines.

• The iron filings will dissolve in air.

• The iron filings will change color.

• The iron filings will repel away from the magnet.

Observe what happens when they place two magnets together (N:N, S:S, N:S). What is the result?

• N:N and S:S repel, N:S attract

• N:N and S:S attract, N:S repel

• All combinations attract

• All combinations repel

Make systematic and careful observations. Take accurate measurements using standard units, including data loggers.

• This describes a good scientific investigation.

• This describes a historical analysis.

• This describes a creative writing process.

• This describes a mathematical proof.

Which of the following lists includes both contact and non-contact forces?

• Friction, Gravity, Magnetic force, Tension

• Friction, Air resistance, Spring force, Tension

• Gravity, Magnetic force, Electrostatic force, Nuclear force

• Friction, Air resistance, Tension, Spring force

The material had which properties that made it a high-friction surface?

• Rough texture and high resistance to movement

• Smooth and slippery surface

• Low resistance to movement

• Non-stick and polished finish

An object travelled at a particular speed over a surface due to which of the following factors related to friction?

• The amount of friction between the object and the surface

• The color of the object

• The shape of the object

• The temperature of the room