T1 waves

Question 1

what type of waves are sound waves

Answer 1

longitudinal waves

Question 2

what type of waves are ripples on surface of water

Answer 2

transverse waves

Question 3

what are the movement of waves called

Answer 3

oscillations

Question 4

how do sound waves travel by

Answer 4

particles in the air moving side 2 side

Question 5

what do you call air particles which are close together

Answer 5

compressions

Question 6

in longitudinal waves the oscillations are what to the direction of energy transfer

Answer 6

parallel

Question 7

in transverse waves the oscillations are what to the direction of energy transfer

Answer 7

perpendicular

Question 8

what do you call air particles that are spaced out

Answer 8

rarefactions

Question 9

what do all longitudinal waves require

Answer 9

a medium to travel in eg air liquid or solid

Question 10

what is an amplitude

Answer 10

the furthest point a wave vibrated from its undisturbed position

Question 11

what is wavelength

Answer 11

the distance from one point of a wave to another

Question 12

what is frequency

Answer 12

number of waves passing a point each second

Question 13

what is unit for frequency

Answer 13

Hz hertz

Question 14

what is period

Answer 14

time in seconds for one wave to pass a point

Question 15

what is wave speed

Answer 15

speed in which energy is transferred

Question 16

ripple tank practical

Question 17

what type of waves are electromagnetic waves

Answer 17

transverse waves

Question 18

what do electromagnetic waves transfer

Answer 18

transfer energy from source to absorber eg microwaves, solar pannels

Question 19

what does the red end of the spectrum mean

Answer 19

lower frequency
higher wavelength

Question 20

what does the violet end of the spectrum mean

Answer 20

higher frequency
shorter wavelength

Question 21

name the whole electromagnetic spectrum

Answer 21

radio
microwaves
infrared
visible light
UV
x rays
gamma rays

Question 22

what is the speed of electromagnetic waves in a vacume

Answer 22

3 x 10 ^8 m/s

Question 23

what happens when electromagnetic waves are generates or absorbed

Answer 23

changes take place in atoms of nuclei of atoms

Question 24

what are the hazards of electromagnetic waves

Answer 24

Gamma rays, x rays, UV: damage the human body
cause cause mutations of genes and risk of cancer

Question 25

how are radio waves produced

Answer 25

when electrons oscillate in electrical circuits

Question 26

radio waves

Answer 26

1. used to transmit radio and tv signals 2. they can travel long distances before being absorbed 3. can reflect layer of charged particles into the atmosphere

Question 27

microwaves

Answer 27

1. used to heat food bc most food contain water molecules which is absorb energy of microwaves and cause temperature to increase 3.

Question 28

infrared

Answer 28

1. emitted by electrical heater and used to cook food in ovens. easily absorbed by objects

Question 29

visible light

Answer 29

1. short wavelength can carry great deal of communication

Question 30

ultraviolet

Answer 30

1. created inside bulb 2. short wavelength absorbs more energy

Question 31

x rays and gamma rays

Answer 31

1. medical imaging 2. very penetrative 3. medical treatments