Quarter Exam!

Question 0

Periodic changes transmitting energy from one place to another are called…

Answer 0

Waves

Question 1

Motion that repeats at a constant rate is called…

Answer 1

Periodic motion

Question 2

A mass attached to an arm at a pivot point swinging under the influence of gravity is called a…..

Answer 2

Pendulum

Question 3

The form of energy detectable by our ears is called….

Answer 3

Sound

Question 4

True or False: reflection occurs when a wave bounces off a surface that doesn’t completely absorb its energy.

Answer 4

True.

Question 5

True or False: refraction occurs when a wave bounces off a surface that doesn’t completely absorb its energy.

Answer 5

False

Question 6

True or False: the length of a wave cycle is its wavelength.

Answer 6

True

Question 7

True or False: the time it takes to complete 1 cycle of a system is its period.

Answer 7

True

Question 8

True or False: the rate at which cycles repeat is called the frequency.

Answer 8

True.

Question 9

True or False: the effect of friction on periodic motion is called resonance.

Answer 9

False.

Question 10

Damping is defined as….

Answer 10

The effect of friction on periodic motion.

Question 11

A transverse wave refers to if …

Answer 11

The vibration of the wave is at at right angle to the direction of travel

Question 12

What is the crest, trough, and wavelength?

Answer 12

Crest- the highest point of a wave
Trough- the lowest point of a wave
Wavelength- the distance between a crest to crest and trough to trough

Question 13

What is the term for how high or how low the sound is to the human ear?

Answer 13

Pitch

Question 14

The effect in which wave frequency is higher or lower relative to the observer moving toward or away from the source of the frequency is called the _______ effect.

Answer 14

Doppler

Question 15

The response of your ear to the intensity of a sound wave is …..

Answer 15

Loudness

Question 16

The rate at which an acoustic wave transmits energy is the …

Answer 16

Intensity

Question 17

The science of _______ is the study of controlling the sounds that reach our ears.

Answer 17

Acoustics

Question 18

Loudness is measured in units called …..

Answer 18

Decibels

Question 19

The particular sound of an instrument is its…..

Answer 19

Quality

Question 20

A pendulum hanging straight down is in its….

Answer 20

Rest position

Question 21

The tendency of a string to be restored to its rest position is called the …..

Answer 21

Restoring force

Question 22

Frequency is measured in units called….

Answer 22

Hertz

Question 23

True or False: resonance is the opposite of damping.

Answer 23

True

Question 24

True or False: resonance is the same as damping.

Answer 24

False

Question 25

True or False: resonance occurs when an outside source adds energy to an oscillating object at its natural frequency.

Answer 25

True.

Question 26

True or False: all objects that can oscillate have a natural frequency.

Answer 26

True.

Question 27

True or False: if the vibration of a wave is parallel to the direction of wave movement it is a longitudinal wave.

Answer 27

True.

Question 28

True or False: if the vibration of a wave is parallel to the direction of wave movement it is a transverse wave.

Answer 28

False.