Science Review 6

Number of vibrations per second

• volume
• pitch
• opaque
• frequency

How high or low a sound is

• volume
• pitch
• frequency
• transparency

The loudness of a sound

• pitch
• volume
• frequency
• reflection

Which of the following objects is translucent?

• tree limb
• waxed paper
• glass window
• brick wall

What type of lens is shown?

• translucent
• convex
• concave
• opaque

What causes a red apple to appear red in the sunlight?

• The apple absorbs all the red light
• The apple bends (refracts) all the red light
• Only red light is reflected by the apple
• Only red light passes through the apple

A student plays a trombone on the stage of an empty gym.  He hears the sound echo back to the stage.  Later, the gym is full of people.  He doesn't hear an echo.
Why does sound echo in the empty gym?

• The sound reflects off the people.
• The sound is absorbed into the people.
• The sound is reflected off the hard, flat, smooth gym walls.
• The sound is refracted all the walls.

Which of the following statements is true about sound

• Sound can travel through space
• sound must travel through a medium
• sound only travels in a straight line until it hits an object
• sound travels at a much faster speed than light travels.

Is this wave a high pitch or a low pitch

• high
• low

Allows all light to pass through

• transparent
• tranlucent
• opaque