Module 4

The speed of a sound wave depends on

• its source

• the force of its compressions.

• the number of waves per second.

• the medium through which it travels.

Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called

• Longitudinal

• Transverse

• Electromagnetic

• Mechanical

Tags

NGSS.MS-PS4-1

What order are the colors of the visible light waves beginning with the lowest frequency?

• violet, indigo, blue, green, yellow, orange, red

• red, orange, yellow, green, blue, indigo, violet

• orange, yellow, green, blue, indigo, violet, red

• red, orange, yellow, green, blue, indigo, purple

Emily’s younger sister Amy has just learned that radio waves, like X-rays, are a form of electromagnetic energy. Amy asks Emily why radio waves aren’t dangerous like X-rays. Which answer is MOST accurate?

• Radio waves have a lower energy than X-rays.

• Radio waves have a lower velocity than X-rays.

• Radio waves have a greater amplitude than X-rays.

• Radio waves have a greater frequency than X-rays.

Tags

NGSS.MS-PS4-1

What properties of a light wave determine its color?

• Wavelength

• Amplitude

• Speed

• Interference

What happens as a sound wave’s energy decreases?

• Wave frequency decreases.

• Wavelength decreases.

• Amplitude decreases.

• Wave speed decreases.

Tags

NGSS.MS-PS4-1

Which of the following describes the observed effect of an electromagnetic wave source moving toward a stationary observer?

• the observer will detect a lower frequency (redder color)

• the observer will detect a higher frequency (bluer color)

• the observer will detect a higher frequency (redder color)

• the observer will detect a lower frequency (bluer color)

Tags

NGSS.HS-PS4-1

A fire truck with a loud siren passes a person standing on the ground. Which of the following best describes the change in the frequency of the siren that the person on the ground hears as the fire truck passes?

• the frequency of the siren decreases as the fire truck moves toward the person, and increases

  as the fire truck passes

• the frequency of the siren increases as the fire truck moves toward the person, and decreases

  as the fire truck passes

• the frequency of the siren increases as the fire truck moves toward the person, and increases

  as the fire truck passes

• the frequency of the siren decreases as the fire truck moves toward the person, and

  decreases as the fire truck passes

Tags

NGSS.MS-PS4-1

What is the primary function of chlorophyll in plants?

• A) Absorb water

• B) Absorb sunlight

• C) Absorb nutrients

• D) Absorb carbon dioxide

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is a chemical change?

• A) Melting of ice

• B) Boiling of water

• C) Rusting of iron

• D) Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5