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?

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

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

A. Light from beside the car 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.

A concave mirror will

focus light to a point in front of the mirror.

focus light to a point behind the mirror.

Of the three waves shown, Wave 2 has the greatest

frequency, because there are more crests in the same length of rope than there are in the other waves.

wave speed, because it has more crests than the other ropes.

frequency, because it has a larger wavelength than the other ropes.

wave speed, because the rope is moving up and down faster than the other ropes.

A student is investigating the transmission of sound waves and light waves through different mediums. The student tests sound wave and light wave transmission within a glass jar with air, without air, and with water. Select the boxes to represent the mediums that will transmit sound waves and light waves. Fill in the table: Sound waves are transmitted with air and with water, but not without air. Light waves are transmitted with air, without air, and with water.

Sound waves: With Air [✔], Without Air [ ], With Water [✔] Light waves: With Air [✔], Without Air [✔], With Water [✔]

Sound waves: With Air [✔], Without Air [✔], With Water [✔] Light waves: With Air [✔], Without Air [ ], With Water [✔]

Sound waves: With Air [ ], Without Air [✔], With Water [✔] Light waves: With Air [✔], Without Air [✔], With Water [ ]

Sound waves: With Air [✔], Without Air [ ], With Water [ ] Light waves: With Air [✔], Without Air [✔], With Water [✔]

A student builds a simple guitar using rubber bands and a card board box. Plucking the rubber bands results in sound waves. Which step would best help the student investigate the effect of changing the resonance of the sound waves?

building a similar guitar using a larger or smaller box

adding more rubber bands to the guitar

adding color patterns to the outside of the box

using more force when plucking the rubber bands

The model represents a sound wave. (Refer to the diagram of a sound wave with a speaker, air particles, and an ear.) Which statement best describes the relationship between matter and energy in a sound wave?

C. Energy in a sound wave transfers between particles of matter in a repeating pattern.

A. Particles of matter transform into energy to produce a sound wave.

B. Energy in a sound wave moves particles of matter from one place to another.

D. Particles of matter are transformed into other types of matter by energy in a sound wave.

The student observes that the shorter straws produce sounds with a higher pitch. Which set of information identifies and explains the characteristic of sound that the student observes?

Characteristic: frequency Explanation: Sounds with higher pitches have greater frequencies.

Characteristic: amplitude Explanation: Sounds with higher pitches have greater amplitudes.

Characteristic: amplitude Explanation: Sounds with lower pitches have greater amplitudes.

Characteristic: frequency Explanation: Sounds with lower pitches have greater frequencies.

The student wants to investigate how sound waves from the straw horn interact with different materials. Which wave property should be tested, and which method should be used to test it?

Wave property: absorption Method: playing the straw horn in a room with hard surfaces and a room with soft surfaces

Wave property: absorption Method: making several sounds from straws of different lengths

Wave property: pitch Method: playing the straw horn in a room with hard surfaces and a room with soft surfaces

Wave property: pitch Method: making several sounds from straws of different lengths

Solar photovoltaic (PV) cells capture sunlight to produce electrical energy. The graph shows the components of sunlight reaching Earth's surface. The table shows three types of PV cells and the wavelengths of light absorbed for electrical production. Which statement explains which PV cells would most likely produce more energy from sunlight?

C. Blue-absorbing PV cells would produce more energy because blue-light wavelengths contain more energy than other wavelengths and produce more energy from sunlight.

A. Blue-absorbing PV cells would produce more energy because infrared light wavelengths are most of the energy in sunlight and produce more energy from sunlight.

B. Red-absorbing PV cells would produce more energy because infrared light wavelengths are most of the energy in sunlight and produce more energy from sunlight.

D. Red-absorbing PV cells would produce more energy because blue-light wavelengths contain more energy than other wavelengths and produce more energy from sunlight.

A student uses three different-sized metal container lids to produce sounds. The student has the three metal lid sizes shown in the table. The student strikes the 45-cm lid to produce a sound. If the student wants to produce a higher-pitched sound, which method should the student most likely use?

striking the 30-cm lid with the same amount of force

striking the same lid with more force

striking the 60-cm lid with the same amount of force

striking the same lid with the same force but from farther away

The diagram shows how sound waves travel from an emergency vehicle to a person inside a building. What does it demonstrate?

Sound waves can pass through walls and reach inside buildings.

Sound waves cannot enter buildings at all.

Sound waves travel only in straight lines and stop at walls.

Sound waves are completely blocked by windows.

Based on the information in Figure 1 and Table 1, which statement best compares a sound wave in a vacuum to a sound wave in air?

C. A sound wave cannot travel in a vacuum because there are no molecules to transfer the energy.

A. A sound wave in a vacuum travels much faster than a sound wave in air because there are no molecules to slow it down.

B. A sound wave in air travels much slower than a sound wave in a vacuum because of the number of molecules in air.

D. A sound wave travels at the same speed in a vacuum as a sound wave in air does.

The diagram shows how a sound wave from an emergency vehicle changes as it moves through air and then through a brick wall. Which statement best describes how the amplitude and energy of a sound wave are affected as the wave travels through air and as the wave travels through a brick wall?

The sound wave has less energy and a smaller amplitude when traveling through a brick wall than when traveling through air.

The sound wave has less energy and a larger amplitude when traveling through a brick wall than when traveling through air.

The sound wave has more energy and a smaller amplitude when traveling through a brick wall than when traveling through air.

The sound wave has more energy and a larger amplitude when traveling through a brick wall than when traveling through air.

Based on Figure 2, which statement best describes how the pitch and the frequency of sound waves are related?

Sound waves with a higher frequency have a higher pitch.

Sound waves with a lower frequency have a higher pitch.

Sound waves with a higher frequency have a lower pitch.

Sound waves with higher and lower frequencies can have the same pitch.

Which evidence from Figure 2 best supports the answer to Part A?

The ambulance sound waves have more waves and a shorter wavelength.

The ambulance sound waves have fewer waves and a longer wavelength.

The fire truck sound waves have fewer waves and a shorter wavelength.

The fire truck sound waves have more waves and a longer wavelength.

7th Grade Waves Summative

Authored by Misty Mohr

Science

7th Grade

NGSS covered

Used 1+ times

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31 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

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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?

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

Which statement below is true?

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

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.

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

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?

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?

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)?

A concave mirror will

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