Sound and light

Question 1

Waves are transfers of energy or matter

Answer 1

Energy

Question 2

Does sound travel better through solids liquids or gasses and why

Answer 2

Solids because the particles are closer together so they vibrate more

Question 3

What is amplitude measured in

Answer 3

Decibels dB

Question 4

What decibels are an average room noice

Answer 4

30-50 decibels

Question 5

Sounds lower that what dB are safe

Answer 5

70 dB and below

Question 6

Sounds above what dB can harm your hearing over time

Answer 6

70 dB and over

Question 7

What is volume measured in

Answer 7

Amplitude

Question 8

What does amplitude depend on

Answer 8

The energy in the vibrations

Question 9

Does low amplitude have smaller or larger range of movement

Answer 9

Smaller range of movement

Question 10

Does high amplitude have smaller or larger range of movement

Answer 10

Larger range of movement

Question 11

Does low amplitude have less or more energy

Answer 11

Less energy

Question 12

Does high amplitude have less or more energy

Answer 12

More energy

Question 13

Wavelength is represented by what

Answer 13

Th Greek letter lambda

Question 14

What is a wavelength

Answer 14

The distance from one point on the wave to the same point on the next wave

Question 15

What is the top of the wavelength called

Answer 15

The peak or the crest

Question 16

What is the bottom of the wavelength called

Answer 16

The trough

Question 17

Amplitude is the distance from where to where

Answer 17

The distance from the middle to the peak or trough

Question 18

What is frequency

Answer 18

The number of waves that pass a fixed point per second how often something happens

Question 19

What is frequency measured in

Answer 19

Hz hertz

Question 20

What is pitch

Answer 20

The high or low tones that you hear

Question 21

1 hertz =

Answer 21

1 sound wave per second

Question 22

First part of the ear sound goes through

Answer 22

Collected by the ear lobe or pinna

Question 23

Second part of the ear sound goes through

Answer 23

Waves travel along the ear canal

Question 24

Third part of the ear sound goes through

Answer 24

Waves make the ear drum vibrate

Question 25

Fourth part of the ear sound goes through

Answer 25

The small bones called ossicles amplify the vibrations

Question 26

5th part of the ear sound goes through

Answer 26

The cochlea turns the vibrations into electrical signals

Question 27

6th part of the ear sound goes through

Answer 27

The auditory nerve takes the signals to the brain

Question 28

How do we see non luminous objects

Answer 28

Light bounces off them and into our eyes

Question 29

Glass and water are

Answer 29

Transparent

Question 30

Tissue paper what and why

Answer 30

Translucent light is scattered and cannot be seen clearly

Question 31

A wall is what and why

Answer 31

Opaque no light can travel through it

Question 32

What direction does light travel in

Answer 32

Straight lines

Question 33

A lense that bends in is a

Answer 33

Concave lense

Question 34

A lense that bends out is a

Answer 34

Convex lense

Question 35

Focal point

Answer 35

Where the rays meet once they have been reflected or refracted

Question 36

Focal length

Answer 36

The distance between the focal point and the edge of the lense

Question 37

3 primary colours

Answer 37

Blue red green

Question 38

3 secondary colours

Answer 38

Cyan magenta yellow

Question 39

What happens to the size of the shadow when the light source is nearer the object

Answer 39

It gets bigger

Question 40

What is reflection

Answer 40

When light hits a surface and changes direction making the image appear somewhere else