Question: Describe the motion of a unanchored rowboat when a water wave passes. Does the wave move the boat forward.

Answer: The row boat moves up and down, as well as slightly back and forth. The row boat returns to its original position after the wave has passed.

Question: Contrast how you would move a spring to make a transverse wave with how you would move a spring to make a longitudinal wave.

Answer: You would move the spring up and down or side-to-side to create a transverse wave. You would move the spring forward and backward to create compressions for a longitudinal matter.

Question: Identify evidence that seismic waves transfer energy without transferring matter.

Answer: Seismic waves and cause great change. Tidal waves and direct damage to building and other structures are caused by earthquakes. However, the waves move through Rock and soil. Rock and soil are not carried along with the waves.

Question: Identify a mechanical wave that is also a longitudinal wave.

Answer: A sound wave is a longitudinal and mechanical wave.

Question: Describe how the world would be different if all waves were mechanical waves.

Answer: If all waves were mechanical waves then light waves would not be able to travel through the vacuum of space. The energy from the Sun would have no way to reach the Earth. As a result, Earth would be very cold and dark.

Question: The average speed of sound in water is 1500 meters per second. How long would it take a sound wave to travel 9000 meters in water?

Answer: T = d/s

T = 9,000/1,500

T = 6 seconds

Question: Identify a wave that speeds up when it passes from air to water as well as one that slows down.

Answer: A sound wave speeds up as it passes from air to water. A light wave slows down as it passes from air to water.

Question: Describe the difference between a longitudinal wave a large amplitude and one with a small amplitude.

Answer: Large Amplitude = More energy

Small Amplitude = Less energy

Question: Describe how the wavelength of a wave changes if the wave slow s down but it’s frequency does not change.

Answer: If the wave slows down with no change in frequency, the wavelength decreases.

Question: Explain how the frequency of a wave changes when the period of the wave increases.

Answer: The frequency of a wave decreases when the period of the wave increases.