Wave behavior and speed

• The wave traveled faster in the denser media because the particles in the media are closer together.

• The wave traveled slower in the denser media because the particles in the media are closer together.

• The wave traveled faster in the denser media because the particles in the media are farther apart.

• The wave traveled slower in the denser media because the particles in the media are farther apart.

Humans see different colors of the visible light spectrum because

• the wavelength of light is reflected by what it is hitting and directed back into the eye

• the wavelength of light is refracted by what it is hitting and directed back into the eye.

• the wavelength of light is diffracted by what it is hitting and directed back into the eye.

• the wavelength of light is absorbed by what it is hitting and directed back into the eye.

A scientist performs an experiment to compare the speed of light waves and sound waves traveling through different mediums. She sends the same light and sound waves from the air through the same solid, liquid, and gas. She records the speed of the wave as it travels through each medium. Which data table most likely shows her results?

• 
• 
• 
• 

When all the colors of the visible spectrum combine, what type of light is formed?

• black

• brown

• white

• blue

A blue light is shined on objects X and Y. Object X appears to be blue, and object Y appears to be black. Which of the following is correct?

• Object X absorbs blue light, and object Y reflects blue light.

• Object X reflects blue light, and object Y absorbs blue light.

• Object X must be black, and object Y must be blue.

• Object X must be blue, and object Y must be black.

As light travels through air and strikes water, which picture shows what happens to the light ray?

• 
• 
• 
• 

• a boy sitting on the grass

• a boy swimming in the water

• a boy sitting in a tree with his ear to the bark

• a boy lying down with his ear to the ground

• to explain that light travels in a curved line until it passes from one material into another

• to explain that light travels in a straight line until it passes from one material into another

• to explain that light travels in a curved line even when it passes from one material into another

• to explain that light travels in a straight line even when it passes from one material into another

Mac and Suzanne cut holes in the bottom of two cups and connect them with a string. When Mac whispers into one cup, Suzanne can hear him through the other. What is the best reason to explain why this happens?

• Sound waves can travel great distances.

• Sound waves from whispering have a higher frequency.

• Sound waves travel better through solids than gases.

• Sound waves produce an echo.

What is the difference between a reflected and a diffracted sound wave?

• A reflected sound wave is absorbed by the medium. A diffracted sound wave changes direction as it passes through an opening.

• A diffracted sound wave bounces back to the place of origin. A reflected sound wave is absorbed as it passes through an opening.

• A reflected sound wave bounces back to the place of origin. A diffracted sound wave changes direction as it passes through an opening.

• A diffracted sound wave bounces back to the place of origin. A reflected sound wave changes direction as it passes through an opening.