Physical Science (4Th Quarter)

Front 1

an oscillation that moves through space, transferring energy from one place to another.

Back 1

wave

Front 2

two main ways of representing a wave on a graph.

Back 2

graphing an oscillation in time

graphing an oscillation in space

Front 3

time is?

Back 3

period

Front 4

space is?

Back 4

wavelength

Front 5

an instrument that detects a varying voltage from an input, such as a microphone,and plots its waveform against time.

Back 5

oscilloscope

Front 6

produces an alternating voltage at a chosen frequency and amplitude. It can also produce a range of different waveforms.

Back 6

signal generator

Front 7

wavespeed formula

Back 7

frequency × wavelength

Front 8

Most types of waves are disturbances that propagate through a?

Back 8

medium

Front 9

travel through the air as variations in pressure and density

Back 9

Sound waves

Front 10

Transverse waves can travel across?

Back 10

a water surface

Front 11

These are known as?

Back 11

surface waves

Front 12

Longitudinal pressure waves can also travel through?

Back 12

a body of water

Front 13

During an earthquake, transverse and longitudinal waves?

Back 13

travel through solid rock away from the epicentre.

Front 14

The waveform of a wave determines?

Back 14

the quality of the sound.

Front 15

The range of human hearing is

Back 15

20–20,000 Hz

Front 16

Whales and dolphins communicate using ultrasound. Many of them also use it for?

Back 16

echolocation

Front 17

Animalsare thought to do this naturally, but it can also be done by a computer, suchas in

Back 17

prenatal scanning.

Front 18

One practical application of ultrasound is ?

Back 18

SONAR

Front 19

Originally an acronym for?

Back 19

Sound Navigation And Ranging

Front 20

distance the sound has travelled equation

Back 20

distance= speed × time

Front 21

Further uses for ultrasound

Back 21

- Jewellers and watch repairers use ultrasound to clean delicate items.

-useful for finding flaws in mechanical structures

Front 22

sound (speech) is to?

Back 22

air

Front 23

surface wave is to?

Back 23

water

Front 24

ultrasound(prenatal scan) is to?

Back 24

tissue

Front 25

S and P waves is to?

Back 25

rock

Front 26

radio waves is to?

Back 26

no medium

Front 27

sound is caused by?

Back 27

vibrations

Front 28

the lowest pitch audible to the human ear is?

Back 28

20 hz

Front 29

the highest pitch audible to the human ear is?

Back 29

20,000 Hz

Front 30

the loudness of a sound corresponds to its?

Back 30

amplitude

Front 31

When waves pass through a gap they?

Back 31

diffract

Front 32

Maximum diffraction occurs when the gap size is ?

Back 32

equal to the wavelength of the waves.

Front 33

If the gap is much smaller than the wavelength...

Back 33

the waves cannot pass through the gap at all.

Front 34

If the gap is much larger than the wavelength...

Back 34

only the edges of the waves diffract.

Front 35

diffraction is a property of?

Back 35

ALL waves

Front 36

diffraction occurs when a wave moves through a gap or?

Back 36

past an obstacle

Front 37

when waves are diffracting through a gap, maximum diffraction occurs when the gap is ____ the wavelength

Back 37

EQUAL to the wavelength

Front 38

TOPIC

Back 38

REFRACTION

Front 39

when light bends as it passes from one medium to another

Back 39

refraction

Front 40

bending of light

Back 40

refraction

Front 41

less > more =

Back 41

towards

Front 42

more > less =

Back 42

away

Front 43

glass with different thickness

Back 43

lens

Front 44

first telescope designed and built by

Back 44

Galileo

Front 45

convex lens is

Back 45

converging

Front 46

concave lens is

Back 46

diverging lens