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physics light and sound > Light & Sound Learning Objectives > Flashcards

Light & Sound Learning Objectives Flashcards

1
Q

1

Year 7 Light & Sound Learning Objectives

A

that in the same substance, light travels in a straight line and at a fixed speed.

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2
Q

2

Year 7 Light & Sound Learning Objectives

A

that the speed of light in air/vacuum is 3 x 108 m/s

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3
Q

3

Year 7 Light & Sound Learning Objectives

A

that light is energy

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4
Q

4

Year 7 Light & Sound Learning Objectives

A

that light spreads out as it travels from a source thus becoming dimmer

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5
Q

5

Year 7 Light & Sound Learning Objectives

A

that shadows are formed because light cannot pass through objects and also light travels in a straight line

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6
Q

6

Year 7 Light & Sound Learning Objectives

A

that the size of the source affects the shadow

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7
Q

7

Year 7 Light & Sound Learning Objectives

A

that an umbra is the absence of light

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8
Q

8

Year 7 Light & Sound Learning Objectives

A

that a penumbra is a reduction in the amount of light

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9
Q

9

Year 7 Light & Sound Learning Objectives

A

how solar and lunar eclipses are formed

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10
Q

10

Year 7 Light & Sound Learning Objectives

A

that light travels faster than sound so we see things before we hear them

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11
Q

11

Year 7 Light & Sound Learning Objectives

A

that luminous objects give out light; that we see non-luminous objects because they scatter light to our eyes

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12
Q

12

Year 7 Light & Sound Learning Objectives

A

that light can be reflected at flat mirrors and when it is the angle of incidence = angle of reflection

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13
Q

13

Year 7 Light & Sound Learning Objectives

A

the use of i = r in periscopes, etc.

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14
Q

14

Year 7 Light & Sound Learning Objectives

A

that in reflection an image is virtual

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15
Q

15

Year 7 Light & Sound Learning Objectives

A

that in reflection the image is laterally inverted

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16
Q

16

Year 7 Light & Sound Learning Objectives

A

that in reflection from a plane mirror the object size = image size

17
Q

17

Year 7 Light & Sound Learning Objectives

A

that in reflection from a plane mirror the image to mirror distance = object to mirror distance

18
Q

18

Year 7 Light & Sound Learning Objectives

A

how to locate an image in a plane mirror by drawing ray diagrams

19
Q

19

Year 7 Light & Sound Learning Objectives

A

that sound is made by objects that vibrate

20
Q

20

Year 7 Light & Sound Learning Objectives

A

that the frequency of vibration of the source is measured in Hertz (Hz)

21
Q

21

Year 7 Light & Sound Learning Objectives

A

how sound is made in different musical instruments

22
Q

22

Year 7 Light & Sound Learning Objectives

A

that a vibrating source causes the layers of air around it to move

23
Q

23

Year 7 Light & Sound Learning Objectives

A

that sound travels by compressing and expanding the surroundings

24
Q

24

Year 7 Light & Sound Learning Objectives

A

that sound travels as a longitudinal wave

25
Q

25

Year 7 Light & Sound Learning Objectives

A

that sound travels best through solids and worst through gases because of the arrangement of the particles

26
Q

26

Year 7 Light & Sound Learning Objectives

A

the relative speed of sound in different mediums

27
Q

27

Year 7 Light & Sound Learning Objectives

A

that sound waves cannot travel through a vacuum because there are no molecules

28
Q

28

Year 7 Light & Sound Learning Objectives

A

that sound waves detected by the ear cause the ear drum to vibrate

29
Q

29

Year 7 Light & Sound Learning Objectives

A

the structure of the ear

30
Q

30

Year 7 Light & Sound Learning Objectives

A

how sound is transmitted through the ear to the brain

31
Q

31

Year 7 Light & Sound Learning Objectives

A

that different people have different ranges of hearing

32
Q

32

Year 7 Light & Sound Learning Objectives

A

that the average human range of hearing is 20 to 20,000 Hz

33
Q

33

Year 7 Light & Sound Learning Objectives

A

that loudness is measured in decibels (dB’s)

34
Q

34

Year 7 Light & Sound Learning Objectives

A

that 0 dB is the threshold of hearing and 130 dB’s is the threshold of pain whilst 140 dB’s causes damage

35
Q

35

Year 7 Light & Sound Learning Objectives

A

that loud sounds can have permanent and temporary effect on the ear

36
Q

36

Year 7 Light & Sound Learning Objectives

A

that some common causes of ear damage

37
Q

37

Year 7 Light & Sound Learning Objectives

A

that noise is unwanted sound

38
Q

38

Year 7 Light & Sound Learning Objectives

A

that the level of noise can be reduced by controlling the source, absorbing the sound, blocking the sound, reflecting or scattering the sound, destroying the sound by interference

physics light and sound (3 decks)

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