Energy and Matter Review

Look at the diagram of the electromagnetic spectrum. Which of the following waves has the most energy?

• microwaves
• X-rays
• visible light
• gamma rays

The amplitude of a wave determines how much energy it has. Which of the waves shown has the MOST energy?

• wave 1
• wave 2
• wave 3

A light wave passes from the air into the water. What happens to the wave as it changes from one material to the other?

• It speeds up and bends
• It slows down and bends
• It stops moving
• It spreads out

Which part of the ear is responsible for collecting sound waves by acting like a funnel?

• outer ear
• middle ear
• inner ear
• auditory nerve

Sound waves are made by vibrating air molecules. The air pushes together and pulls apart as the wave moves. Sound waves are ________________

• transverse
• compressional
• both transverse and compressional
• neither transverse or compressional

Which types of waves are the most dangerous to human health?

• high energy waves like gamma rays and ultraviolet rays
• low energy waves like radio waves and infrared waves
• medium energy waves like visible light

In which state of matter are the molecules moving the slowest?

• solid
• liquid
• gas

In which state of matter are the molecules usually the closest together?

• solid
• liquid
• gas

When matter changes from gas to liquid, this process is known as ___________.

• evaporation
• condensation
• melting
• freezing

When matter changes from solid to liquid, the molecules are

• gaining energy
• losing energy
•  maintaining the same amount of energy