Waves in Action

What occurs when sunlight hits metal and blinds the driver of a car?

• absorption

• conduction

• reflection

• refraction

Tags

NGSS.MS-PS4-2

What object would Elgie use to put on her lip gloss?

• insulator

• lens

• mirror

• prism

Light travels in waves. As the amplitude of a wave increases, light gets brighter. Which image shows the brightest light wave?

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Tags

NGSS.MS-PS4-1

The illustration shows a transverse wave. Which bar measures the wavelength of a wave?

• Bar W

• Bar X

• Bar Y

• Bar Z

Falcons hunt during the day. They search for food from high in the sky. When they spot food, they swoop down at up to 180 km per hour to capture it. Owls are different from falcons, because they hunt at night. Even though they hunt at different times of the day, owls and falcons both use their eyes to find food. Falcons and owls take in and process visual images the same way.

Miguel recently bought some chickens that lay eggs. He keeps the chickens in his backyard. Miguel noticed a falcon circling over his yard during the day. When it got dark, Miguel noticed the falcon left. Instead, he saw an owl flying over the yard at night. Miguel is afraid the falcon or the owl will see his chickens and take them. Miguel begins brainstorming ideas to keep the larger birds from seeing the chickens in the backyard. If the hunting birds can't see the chicken, they will not take them. Why does the falcon hunt during the day?

• It is easier for the falcon to see.

• It is easier for the falcon to hide from prey.

• The falcon relies on its sense of hearing to hunt.

• The falcon prefers to hunt when it is cold outside.

When a mirror is placed by a fish bowl with beta fish swimming inside, the beta fish sees what appears to be another fish. This occurs because of

• absorption

• refraction

• reflection

• diffraction

Tags

NGSS.MS-PS4-2

Which of these objects is visible because it reflects light toward the eye?

• burning candle

• flashlight bulb

• glowing campfire log

• shiny metallic balloon

Tags

NGSS.MS-PS4-2

Which of the following best describes what happens when a student looks in the mirror?

• The mirror acts as a light source that lights the student's face.

• Light waves bouncing off the student's face reflect off the mirror.

• Matter from the student's face is transformed into light waves in the mirror.

• The student's eyes see light waves reflecting off the mirror as solid matter.

Tags

NGSS.MS-PS4-2

How is a telephone able to transmit sound?

• It conducts vibrations from speaker to receiver.

• It magnifies a person's voice.

• It carries the sounds through wires.

• It converts vibrations to electrical signals.

Luke plays a knee drum. When he strikes the drum with the mallet, it makes a sound. Why does the drum make a sound?

• because her knee moves

• because the drum heard is round

• because the top of the drum vibrates

• because the mallet is made of wood