Front

What is the main source of energy for nearly all processes on Earth?

Back

The Sun.

Front

How does energy from the Sun travel to the Earth?

Back

Through electromagnetic waves.

Front

What is ultraviolet radiation?

Back

An invisible form of energy with wavelengths shorter than violet light.

Front

How are electromagnetic waves classified?

Back

By wavelength.

Front

What color is on the outside of a rainbow?

Back

Red, because it has the longest wavelength.

Front

What are electromagnetic waves?

Back

Waves of energy that travel through space and do not require a medium.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Approximately 299,792 kilometers per second (the speed of light).

Front

What is the relationship between wavelength and frequency in electromagnetic waves?

Back

They are inversely related; as wavelength increases, frequency decreases.

Front

What type of electromagnetic wave is used for communication?

Back

Radio waves.

Front

What is the visible spectrum?

Back

The range of electromagnetic waves that can be seen by the human eye.