Unit Test

Review

(Modules 3.4 & 3.5)

By Flora Heyrosa

Multiple Choice

These objects allow some light to pass through them. Objects appear fuzzy as well through these materials. What is described here?

• translucent

• transparent

• opaque

• None of the above.

Multiple Choice

What objects allow light to pass through them?

• translucent

• transparent

• opaque

• None of the above.

Multiple Choice

What objects do not allow light to pass through them?

• translucent

• transparent

• opaque

• None of the above.

Multiple Choice

The pencil in the given illustration looks bent because there is a change in the direction of light due to the change in speed. What behavior of light is described here?

• reflection

• refraction

• absorption

• transmission

Open Ended

What unit is used when measuring the intensity or loudness of a sound wave?

HINT: It is abbreviated as dB.

Open Ended

What is pitch?

What will happen if you lengthen the air column in a brass or woodwind instrument?

Altering the length of the air column changed the pitch of the note produced by our simple wind instrument. Shortening the air column resulted in notes of higher pitch. Lengthening the air column resulted in notes of lower pitch.

Subject | Subject

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 On a stringed instrument such as a guitar or violin a thinner string will generally make a higher note, but also shortening the string by stopping it with the finger will produce a similar effect.

Subject | Subject

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The tension of a string or drumhead also affects frequency. The tighter the drumhead, the higher the frequency, as applies also to guitar strings! So, by tuning the tension rods positioned at lugs around a drum, we can increase and decrease the frequency to achieve our preferred sound or pitch.

Subject | Subject

Some text here about the topic of discussion

Open Ended

What is echolocation?