S8P4DEFG REVIEW

What is the difference between a reflected and a diffracted sound wave?

• A reflected sound wave is absorbed by the medium. A diffracted sound wave changes direction as it passes through an opening.

• A diffracted sound wave bounces back to the place of origin. A reflected sound wave is absorbed as it passes through an opening.

• A reflected sound wave bounces back to the place of origin. A diffracted sound wave changes direction as it passes through an opening.

• A diffracted sound wave bounces back to the place of origin. A reflected sound wave changes direction as it passes through an opening.

which of the following boys would hear a rock fall off of a cliff a kilometer away?

• a boy lying down with his ear to the ground

• a boy sitting in a tree with his ear to the bark

• a boy swimming in the water

• a boy sitting on the grass

When a transverse wave travels through a medium, how do the individual particles of the medium move?

• in ellipses

• perpendicular to the direction the wave travels

• in circles

• parallel to the direction the wave travels

What happens to the speed of sound as it travels through a gas and into a solid?

• The speed increases.

• The speed decreases.

• The speed increases and then decreases.

• The speed decreases and then increases.

What would cause a beam of light to increase in wavelength and bend away from the normal?

• Passing from a round glass into a square glass

• Passing from air into glass

• Passing from a water faucet into a bathtub of water

• Passing from glass into air

Which characteristic of a wave changes as the wave travels across a boundary between two different media?

• phase

• speed

• frequency

• period

What wave characteristic is responsible for the pitch of a sound?

• loudness

• quality

• intensity

• frequency

How are wavelength and frequency related?

• If the distance between the crests of the waves increase, the frequency decreases.

• If the distance between the crests of the waves decrease, the frequency decreases.

• If the speed between the crests of the waves increases, the frequency increases.

• If the speed between the crests of the waves decreases, the frequency increases.

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

How does a concave lens differ from a convex lens?

• A convex lens is another way to describe a plane mirror; a concave lens is curved

• A concave lens is curved inward on both sides; a convex lens is on only one side

• A convex lens has a thick center and thin edges, a concave lens has a thin center and thicker edges

• A convex lens has a thin center and thick edges. a concave lens has a thick center and thinner edges