Waves Unit Test

Why does a red rose look red?

• The rose absorbs red more than any other color.

• The rose refracts red more than any other color.

• The rose receives only red light from the Sun.

• The rose reflects red more than any other color.

Brenda holds a lens near a newspaper. The text on the paper appears larger through the lens.

Brenda is most likely holding a _______ lens.

• convex

• plane

• concave

• 
  reflective

A piano concert is taking place in an auditorium. When the pianist plays a note on the piano, the strings vibrate back and forth at a particular frequency. These vibrations travel through the air as a sound wave toward the audience as shown in the diagram below.

An usher stands in the lobby, out of sight of the piano, and listens to the music.

Which of the following is the most reasonable explanation why the usher can hear the music and yet not be in front of the open door?

• The sound waves are diffracted through the door opening.

• The sound waves are refracted by the cooler air in the lobby.

• The sound waves have strong interference at these wavelengths.

• The sound waves are reflected by the many people in the auditorium.

Sound waves are _______________

• Transverse waves
• Longitudinal waves
• Cyclic waves

• Electromagnetic waves

Which of the following is an example of sound waves being reflected?

• Tabitha calls to Sam from across a field; Sam hears her voice several moments later.

• Tabitha yells into an empty room and then hears her voice several moments later.

• Tabitha speaks softly to herself and hears her voice almost immediately.

• Tabitha shouts to Sam while he is scuba diving; Sam hears her voice several moments later.

Garrett throws a large rock into a waveless pond. The impact of the rock hitting the water causes waves to travel along the pond's surface toward the shore.

If Garrett counts the number of waves that reach the shore over a 10‑second period, what property of the waves is he measuring?

• speed

• 
  amplitude

• wavelength

• frequency

Neil tries to read a book while wearing his father's glasses. He notices that the words appear smaller when viewed through the lenses.

Neil is most likely looking through _______ lenses.

• convex

• plane

• reflective

• concave

Heather and Haley are modeling the movement of a wave using a rope. When Heather gives one end of the rope a quick up and down shake, a wave travels down the rope toward Haley. Look at the picture of the rope model shown below.

Which arrow in the picture shows the amplitude of the wave?

• W

• X

• Y

• Z

Which of the following colors of light has the shortest wavelength?

• Blue

• Green

• Violet

• Red

A glass window is a clear object that light passes through as it travels in a straight line.

This is a good example of

• absorption of light.

• transmission of light.

• refraction of light.

• reflection of light.