A beam of light is directed toward two different materials, A and B. The image shows how the beam’s light waves interact with the materials.

What can be concluded about materials A and B?

• Material A is translucent, and material B is transparent.

• Materials A and B are transparent.

• Materials A and B are translucent.

• Material A is transparent, and material B is opaque.

Tags

NGSS.MS-PS4-2

Examine the chart that lists several statements regarding cell phone use of radio signals for transferring information.

Which statements are true regarding cell phone use of radio signals?

• 1 and 3 only

• 1, 2, and 4

• 2, 3, and 4

• 2 and 4 only

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What do all types of waves transfer from place to place?

• water

• matter

• air

• energy

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Why does a red apple appear red when placed under a white light?

• The apple absorbs all light.

• The apple reflects all light.

• The apple reflects red light and absorbs all other colors.

• The apple absorbs red light and reflects all other colors.

During a field trip, Joe visits a hillside and sees the clear image of a small mountain on the smooth surface of the nearby lake.

What behavior of light can explain the appearance of the small mountain on the water's surface?

• reflection

• transmission

• refraction

• absorption

Tags

NGSS.MS-PS4-2

The device in the image is an example of how engineers develop technology to solve problems.

What is the function of this device?

• to convert energy from an electrical current into wind energy

• to convert energy from the Sun into electrical energy

• to convert energy from waves or moving water into electrical energy

• to convert energy from wind currents into solar energy

Tags

NGSS.MS-PS3-5

Three sound waves labeled 1-3 are created in separate experiments. The diagrams show the waves over the course of two seconds.

Which statement correctly describes the waves produced in the experiments, assuming all of the waves are traveling at the same speed?

• Sound wave 2 is made by a tone of lower frequency and twice the amplitude of sound wave 1.

• Sound wave 3 is made by a tone of higher frequency and the same amplitude as sound wave 1.

• Sound wave 3 is made by a tone of the same frequency and the same amplitude as sound wave 2.

• Sound wave 1 is made by a tone of the same frequency and four times the amplitude of sound wave 3.

Tags

NGSS.MS-PS4-1

The students in the diagram are communicating with the cans and string.

Which is the most likely explanation of how the students can hear and communicate using the objects?

• Sound bounces off the can and echoes in the other student's ear.

• Sound travels through the string as an electromagnetic wave.

• A mechanical wave transfers sound through the string.

• Transverse wave transfers sound through the rope.

What is measured by the distance between two troughs of the wave?

• wavelength

• frequency

• amplitude

• speed

Tags

NGSS.HS-PS4-1

Which wave can be transmitted through empty space?

• tidal

• sound

• mechanical

• electromagnetic