1. What would you measure to determine a wave’s frequency?

A. The distance from the crest to the trough

B. Its height from the crest to its resting point

C. How often a compression crosses a fixed point

D. The distance between adjacent crests The dist

ance fr

om the cr

e..

Its height f

rom th

e crest

t...

How often a compre

ssion...

The distance

between ad...

0%5%

74%

21%

2. How do vibrations get from the eardrum to the cochlea?

A. Air is pushed into the eardrum.

B. Vibrations hit the outer ear.

C. The brain first receives a sound wave.

D. They pass through the hammer, anvil, and stirrup.

Air is p

ushed in

to th

e ea...

Vibrations h

it the oute

r ear.

The brain first re

ceives a

...

They pass

thro

ugh th

e ...

9%

52%

9%

30%

3. Microwaves, gamma rays, X-rays, and infrared waves all travel through empty space. Which type of waves

are these?

A. ElectromagneticB. MechanicalC. Sound wavesD. longitudinal

Electromagnetic

Mech

anical

Sound waves

longitudinal

95%

0%0%5%

4. If you observe a piece of white paper placed under a green light, why does the paper appear to be

green?A. White paper absorbs all

light waves.B. White paper reflects all

the light waves shining on it, which in this case is only green light.

C. Green light scatters more than all other wavelengths.

D. White paper can only absorb green light waves.

White

paper abso

rbs a

ll l...

White

paper reflects

all t..

Green lig

ht sca

tters more

...

White

paper can only

ab...

53%

5%0%

42%

5. If air becomes warmer, what happens to the speed of sound?

A. It increases.B. It decreases.C. It doesn’t

change.D. It oscillates.

It incre

ases.

It decre

ases.

It doesn

’t change

.

It osci

llates.

80%

0%0%

20%

6. What is one way that mechanical waves differ from electromagnetic

waves?

A. Mechanical waves cannot travel through a vacuum.

B. Mechanical waves do not carry energy.

C. Mechanical waves are not created by a vibration.

D. Mechanical waves cannot be described by their wavelength. M

echanica

l wave

s cannot..

.

Mech

anical w

aves d

o not...

Mech

anical w

aves a

re no...

Mech

anical w

aves c

anno...

63%

11%

26%

0%

7. Why do sound waves travel faster in solids than in the air?

A. Solids will not allow waves to be diffracted.

B. Solids reflect sound better than gases.

C. Molecules in a solid are packed closer together than in a gas.

D. The molecules in air vibrate too rapidly to transmit sound. Solid

s will

not allo

w wav..

Solids r

eflect so

und bett..

Molecu

les in a so

lid ar

e ...

The molecu

les in air v

ibr...

6%0%

83%

11%

8. Amplitude is measured in which unit?

A. MetersB. Meters/secondC. DecibelsD. Hertz

Mete

rs

Mete

rs/se

cond

Decibels

Hertz

6%

28%

67%

0%

9. Gabriel is standing on a street corner as an ambulance approaches. As the

ambulance gets closer, the pitch of the sound waves is higher. Then, as an

ambulance passes and moves farther away the pitch decreases. Based on this

information, what do the sound waves from the siren have when the ambulance is being

driven toward? A. The same frequencyB. A higher frequencyC. A decreasing

frequencyD. A lower frequency

The same fr

equency

A higher f

requency

A decreasin

g frequency

A lower f

requency

0% 0%6%

94%

10. An automobile changes energy stored in gasoline into different

forms. The total amount of energy does not change due to the

A. Energy efficiency of the car

B. Law of conservation of energy

C. Process of recycling matter

D. Production of new energy as needed. Energ

y effi

ciency

of the ca

r

Law of c

onserva

tion of e...

Proce

ss of r

ecycli

ng matt

er

Producti

on of new energ.

..

21%

0%

21%

58%