sound - Grade 7 C - Term 2

Sound cannot pass through ____________.

• air

• vacuum

• gas

• liquid

The vibrating loudspeaker cone makes the air molecules next to it move _______________.

• back and forth

• up and down

Sound is produced by -----

• Heat energy

• Low temperatures

• Vibrations

• Friction

Tags

NGSS.MS-PS3-5

The unit for measuring frequency is the ---

• joule

• hertz

• gram

• newton

When a sound is louder what measurement gets bigger?

• Frequency 
• Amplitude 
• Wavelength 
• Crest

Tags

NGSS.MS-PS4-1

What does pitch depend on?

• amplitude 
• frequency
• intensity 
• volume of sound

What frequency range represent the human hearing capacity

• Below 20 Hz
• Between 20 Hz and 20 000 Hz
• Between 20 000Hz and 40 000 Hz
• Above 20 000 Hz

What do you call these sound waves whose frequency is above 20,000 hertz?

• a. ultrasound

• b.infrasound

• c. noise

• d.echo

What is frequency?

• the number of vibrations per second
• how high or low a sound is
• the loudness or softness of a sound
• the back and forth movement of matter

Tags

NGSS.MS-PS4-1

A longer string makes a _______ pitch than a short string.

• louder
• softer
• higher
• lower