7th Grade Waves Summative

Refer to the table below: | Wave | Observations | |------|-----------------------------| | A | Travels fastest through air. | | B | Travels more slowly through water than air. | | C | Travels fastest through metal. | Which statement is best supported by the table?

• Wave C and B are light waves.

• Wave C is a sound wave. Waves A and B are light waves.

• Wave C is a light wave. Waves A and B are sound waves.

• Wave B is a sound wave. Waves A and C are light waves.

Tags

NGSS.MS-PS4-2

As light passes from one transparent medium to another, what behavior is most likely to be observed?

• Reflection

• Bouncing

• Absorption

• Refraction.

Tags

NGSS.MS-PS4-2

Which statement below is true?

• A. As the intensity of sound waves increase, the speed of the wave increases.

• B. As sound waves increase in intensity, the volume will also increase.

• C. As the intensity of a sound wave increases, so does the amplitude. However, has no effect on the volume.

• D. As the intensity of a sound wave increases, the frequency must also increase.

Tags

NGSS.MS-PS4-1

Which statement best describes the behavior of the different colors of light exiting the prism after the white light shines on it?

• The different colors of light reflect at the same angle.

• The different colors of light reflect at different angles.

• The different colors of light refract at the same angle.

• The different colors of light refract at different angles.

Tags

NGSS.MS-PS4-2

Remus draws a wave that has a 10 cm vertical distance between the trough and the crest. James draws a wave that is 5 cm vertical distance between the equilibrium and the trough.

• Remus' wave has a higher amplitude, and more energy.

• Remus' and James' waves have the same amplitude, but Remus' has more energy than James'.

• James' wave has a higher amplitude and more energy than Remus'.

• Remus' wave and James' wave have the same amplitude and the same energy.

Tags

NGSS.MS-PS4-1

Which of the following properties makes a light wave different from all mechanical waves?

• A. A light wave slows down in a vacuum.

• B. A light wave is able to transmit energy.

• C. A light wave exists as a transverse wave.

• D. A light wave can travel without a medium.

A student looks into a mirror and sees the wall behind him. Which of the following best describes why the student sees the wall in the mirror?

• Light reflects off the mirror.

• Light curves around the mirror.

• Light passes through the mirror.

• Light scatters when it hits the mirror.

Tags

NGSS.MS-PS4-2

Some car side mirrors have a small extra mirror. This extra mirror is circular and curved like a dome. The picture shows what the driver sees in one of these side mirrors. Which statements best explain how the small curved mirror helps a driver see objects near the car?

• A. Light from beside the car reflects into the driver's eyes.

• B. Light from many directions reflects into the driver's eyes.

• C. Light from the car's other mirrors reflects into the driver's eyes.

• D. The driver can see only a few objects near the car.

• E. The driver can see objects in many places near the car.

Tags

NGSS.MS-PS4-2

This diagram shows a ray of light being reflected off of a mirror. If a light ray hits a spoon at an angle of 60° (Seen as angle I in the diagram), at what angle will the light ray reflect off of the spoon (Shown as angle R in the diagram)?

• 60

• 30

• 45

• 90

Tags

NGSS.MS-PS4-2

A concave mirror will

• focus light to a point in front of the mirror.

• spread light out.

• focus light to a point behind the mirror.

• absorb the light