Unit 3 Waves and Information Transfer Assessment

A student makes four different sounds. Which sound has the most energy?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS4-1

Which statement describes a wave?

• Water moves up and down when it is disturbed.

• Water moves out of a bucket when the bucket is overfilled.

• Water moves in a circle when it goes down a drain.

• Water moves through a pipe when a faucet is turned on.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

A science class wants to make a model of waves. Which sentence describes the best model?

• Drop paper from the top of stairs to see how it moves.

• Roll toy cars down different ramps to see which is the fastest.

• Attach one end of a long rope to a wall, and shake the rope up and down.

• Fill a bathtub with water, and gently place a plastic toy on the surface.

Tags

NGSS.MS-PS4-1

How do cell phones receive decoded information over long distances?

• They receive digitized information and change it to voice.

• They receive voice and change it to digitized information.

• They receive digitized information and change it to Morse code.

• They receive Morse code and change it to digitized information.

Which sentence correctly compares Morse and binary codes?

• Morse code is used by cell phones, and binary code is used by computers.

• Morse code and binary code cannot be used to send messages short distances.

• Morse code and binary code use patterns to represent letters in a written message.

• Morse code can only be sent with sound, and binary code can only be sent with electricity.

Tags

NGSS.MS-PS4-3

A student looks at a flower. She can see the flower because light from the sun _____________ off the flower and into her eyes.

• refracts

• reflects

• opaque

• transparent

Tags

NGSS.MS-PS4-2

Engineers have improved cell phones. The phones can take and send clearer photos. Engineers have improved the way phones send photos by the camera on the phone takes photos with _______ pixels.

• more

• fewer

• none

The Sound of Drums

Jill is doing an investigation about waves. She has three different-sized drums.

When she hits each drum exactly the same way, they make different sounds. The waves made by these sounds are shown in the diagram.

What is the correct order of the waves in the diagram, from shortest wavelength first to longest wavelength?

• Drum 3 Drum 2 Drum 1

• Drum 2 Drum 1 Drum 3

• Drum 1 Drum 2 Drum 3

• Drum 3 Drum 1 Drum 2

Tags

NGSS.MS-PS4-1

The diagram shows Jill looking at a drum.

Which sentences explain why Jill can see the drum?

• Light from the sun hits the drum.

• Jill’s eyes reflect the drum’s light.

• Reflected light enters into Jill’s eyes.

• The drum is making light that Jill can see.

Tags

NGSS.MS-PS4-2

Jill brings the drum inside into a dark room. Why can she no longer see the drum?

• Her eyes cannot reflect light.

• The drum is black in the dark.

• The drum cannot reflect light.

• Her eyes turn black in the dark.