Electricity, Sound and Light

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created by electric current. It can be turned on and off.

Front

Why would you use an electromagnet instead of a regular magnet?

Back

You need to be able to turn the magnet on and off.

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or tested in an experiment, which is affected by changes in the independent variable.

Front

In the drum experiment, what was the dependent variable?

Back

The pitch of the drum.

Front

What does it mean for a material to be transparent?

Back

A transparent material allows most light to pass through it.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another, causing objects to appear shifted or distorted.

Front

What is the reason a cooler appears closer to the surface of water?

Back

The cooler appears closer because light is refracted.

Front

What happens to light when it passes through water?

Back

Light is refracted at an angle, which can change the appearance of objects.

Front

What is sound?

Back

Sound is a form of energy that travels in waves through air, water, or solids.

Front

What is pitch in sound?

Back

Pitch is how high or low a sound is, determined by the frequency of the sound waves.