Waves and Energy Review

Doctors use ultrasound imaging to look at organs and other structures within the body. The device sends high frequency waves into the body. How is the image formed when these waves hit boundaries between body tissues?

• reflection of sound waves to a probe

• absorption of sound waves by tissues

• interference of tissues by the sound waves

• refraction of sound waves to a probe

Tags

NGSS.MS-PS4-2

When John broke his arm, the doctor took an x-ray of John’s arm. John had never seen an x-ray before. He asked the doctor how the x-ray was able to show his bones but not his skin and other tissue. Which explanation would the doctor BEST provide to John?

• X-rays have lower energy than visible light and therefore produce a black background behind the bone image.

• X-rays have higher frequency than visible light and therefore can pass through skin and tissue but not through the bone.

• X-rays have lower frequency than infrared light and therefore penetrates through the bone.

• X-rays have higher frequency than gamma rays and therefore pass through skin and bone.

Tags

NGSS.MS-PS4-2

Wave interference can be constructive or destructive, which changes the amplitudes of the waves that are transmitted. Which of the following is a possible explanation for how wave interference could be used to filter unwanted light in astronaut visors?

• Constructive interference causes the light waves to have lower amplitudes and less energy to penetrate the visor.

• Constructive interference increases the frequency of the waves, which have lower energy to penetrate the visor.

• Destructive interference causes the light waves to have lower amplitudes and less energy to penetrate the visor.

• Destructive interference causes the light waves to have greater amplitudes and less energy to penetrate the visor.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What evidence explains how refraction is used during eye exams? Select two correct answers.

• Light changes direction as it passes from the air into the eye.

• An image of the retina is seen using ultraviolet waves.

• Infrared light measures how light changes as it enters the eye.

• Light bends at different angles depending on the thickness of the lens.

• Reflection measures a person’s need for glasses by identifying their focal point.

A student heats a casserole in a microwave. After a few minutes the student checks the casserole and finds that one spot is very hot. Another nearby spot in the casserole, however, is much cooler. Which of the following wave properties produced the very hot spot in the casserole?

• conduction

• interference

• refraction

• divergence

Tags

NGSS.MS-PS4-2

The frequency of a wave is…

• Is how many waves pass each second

• Is measured in Hertz

• Is effected by the wavelength and the speed of the wave

• Both A and C

• All of the above

Tags

NGSS.HS-PS4-1

Which of wave has the highest energy?

• a

• b

• c

Tags

NGSS.MS-PS4-1

Which of the following waves has the lowest energy, assuming the amplitude is the same?

• a

• b

• c

• d

Tags

NGSS.MS-PS4-1

A wave is…

• A wrinkle in time

• A disturbance that carries energy

• An energy that carries disturbances

• Any object moving through space

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

A longitudinal wave is one where...

• The force used to make the wave moves parallel to the waves motion

• The force used to make the wave moves perpendicular to the waves motion

• The wave can travel through empty space

• The wave cannot travel through empty space