Grade 7- Sound

What is frequency?

• The number of viibrations per second.

• How high or low a sound is.

• The loudness or softness of a sound.

• The back and forth movement of matter.

When a sound is louder, what measurement gets bigger?

• Frequency

• Amplitude

• Wavelength

• Crest

Sounds cannot pass through _____.

• Air

• Vacuum

• Gas

• Liquid

Sound is produced by _____.

• Heat Energy

• Low temperatures

• Vibrations

• Frictions.

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

• Louder

• Softer

• HIgher

• Lower