What is the Doppler Effect?

• A change in frequency due to the relative motion of a wave source and an observer

• When a wave overlaps with another wave

• When a wave bounces off of another object

• When a wave bends due to traveling through a different medium

Tags

NGSS.HS-PS4-1

Short sound waves are...

• high pitched
• low pitched
• medium pitched

Tags

NGSS.HS-PS4-1

When the car moves AWAY from you, its horn seems...

• Low pitched
• High pitched
• Normal

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NGSS.HS-PS4-1

When an ambulance move TOWARD you it sounds ________ pitched. 

• high
• low
• medium

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NGSS.HS-PS4-1

What can you tell about this object's motion?

• Moving to the North (up).
• Moving to the South (down). 
• Moving to the West (left). 
• Moving to the East (right). 

What can you tell about the motion of this object?

• Moving left.
• Moving right quickly.
• Standing still. 
• Moving up slowly. 

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NGSS.HS-PS2-1

You are standing on the side of the road when a police car races past you with its siren on. After the police car passes you, what happens to the pitch of the siren?

• It increases

• It decreases

• It turns red

Tags

NGSS.HS-PS4-1

Look at the picture. Who is experiencing a lower pitched sound?

• Observer A

• Observer B

• There is no difference

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NGSS.HS-PS4-1

What energy is the shortest wavelength?

• Radio

• Infrared

• X rays

• Gamma

Tags

NGSS.HS-PS4-1

What energy is the longest wavelength?

• Radio

• Infrared

• X rays

• Gamma