Chapter 14 Sound and Light

What type of energy is formed by vibrating objects?

• light energy
• sound energy
• chemical energy
• mechanical energy

Which word belongs in this sentence?
A sound wave is a type of _______________ wave.

• parallel
• perpendicular
• longitudinal
• radio

Where would you be traveling in complete silence?

• outer space
• under the ocean
• in a solid wood room
• at the top of a mountain

A guitarist strums two strings on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the first string?

• The first string has a higher pitch than the second string.
• The second string has a higher pitch than the first string.
• The first string and the second string have the same pitch.
• The pitch of the second string depends on teh pitch of the first string.

Look at the picture. Which part of the ear is filled with liquid that vibrates, causing little hairs to move?

• cochlea
• eardrum
• middle ear
• outer ear

How are light waves and sound waves alike?

• They both are invisible.
• They both carry energy.
• They both travel in vacuums.
• they both are harmful to cells.

When does light refract?

• When light travels in a vacuum.
• When light moves through cold air.
• When light travels in only one medium.
• When light moves from ne medium to another.

Look at the picture.
What type of material is used to make the stained glass window?

• opaque
• reflective
• transparent
• translucent

Which muscular part of the eye controls how much light enters the eye?

• lens
• iris
• pupil
• cornea

What happens to light that passes through a concave lens?

• The light rays spread apart.
• The light rays are absorbed.
• The light rays come together.
• The light rays move in a straight line.