Unit 3 Review-Magnetism

Front

What is magnetism?

Back

Magnetism is a force that can attract or repel certain materials, like iron, and is caused by the motion of electric charges.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created by electric current flowing through a wire wrapped around a metal core.

Front

How can you make an electromagnet stronger?

Back

You can make an electromagnet stronger by adding more loops of wire around the nail or increasing the electric current.

Front

What happens when you spin a top?

Back

When you spin a top, it stays upright due to a force called angular momentum, but it will eventually fall over due to gravity.

Front

What is friction?

Back

Friction is a force that opposes motion between two surfaces that are in contact.

Front

How can you reduce friction?

Back

You can reduce friction by using wheels, lubricants, or smooth surfaces.

Front

What is the role of a magnet in finding metal objects?

Back

A magnet can attract metal objects, making it easier to find them.

Front

What is the effect of speed on the stability of a spinning object?

Back

The faster an object spins, the longer it can stay upright due to increased angular momentum.

Front

What is a simple machine?

Back

A simple machine is a device that makes work easier, such as levers, pulleys, and wheels.

Front

What is the relationship between mass and motion?

Back

The greater the mass of an object, the more force is needed to move it.