Wave Properties and Behavior

The ambulance is moving towards the woman standing on the sidewalk.

As the ambulance approaches the woman, how will she perceive the pitch of the siren and why? 

• 
  She will perceive a higher pitch because the speed of the sound waves is faster

• 
  She will perceive a higher pitch because the speed of the sound waves is faster

• 
  She will perceive a higher pitch because the frequency of the sound waves is higher.

• 
  The pitch she will perceive will be the same, only the intensity of the sound is greater.

Tags

NGSS.HS-PS4-1

The wavelengths of red, green, and blue are shown in the table.

Which statement correctly compares the frequency and energy of two different colors of light?

• Red light has a lower frequency and more energy than green light.

• Red light has a greater frequency and less energy than green light.

• Green light has a lower frequency and less energy than blue light.

• Green light has a greater frequency and more energy than blue light.

Tags

NGSS.MS-PS4-1

Which electromagnetic waves have the longest wavelengths and lowest energy?

• gamma rays

• infrared waves

• radio waves

• visible light waves

Tags

NGSS.HS-PS4-1

Using the provided data table as a guide, which of the following statements BEST explains how different media affect the speed of light?

• The speed of light increases as it passes into a solid because the molecules are closer together and refraction allows it to bend and pass through faster.

• 
  The speed of light increases as it passes into a liquid because the molecules are closer together and refraction allows the light to pass through faster.

• 
  The speed of light travels fastest in air because the molecules are the farthest apart and there is little to no refraction

• 
  The speed of light travels fastest in solids because the molecules are closest together and there is refraction.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which of the following models depicts changes in sound waves that would occur as an ambulance moves AWAY from a hospital with its siren on?

• 
• 
• 
• 

What illustration models DIFFRACTION?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-2

Which type of wave can travel through a vacuum?

• sound waves

• mechanical waves

• water waves

• electromagnetic waves

The table shows the speed of sound waves in different media.

Based on the table, sound waves travel faster in which medium?

• Gases because sound wave vibrations travel quickly through molecules that are spread apart.

• Solids because sound wave vibrations travel quickly though molecules that are spread apart.

• Gases because sound wave vibrations travel quickly through molecules that are closer together.

• Solids because sound waves vibrations travel quickly through molecules that are closer together.

Tags

NGSS.HS-PS4-1

Sound waves

Electromagnetic or mechanical wave?

• Electromagnetic

• Mechanical

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Light

Electromagnetic or mechanical wave?

• electromagnetic

• mechanical

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2