electromagnetic spectrum

Question 1

radio waves
uses:
dangers:
how its made:

Answer 1

uses: communication/ bluetooth
dangers: none
how its made: oscillations in electrical circuits

Question 2

microwaves
uses:
dangers:
how its made:

Answer 2

uses: heat food/ satelites
dangers: burning
how its made: oscullations in electrical circuits

Question 3

infrared radiation
uses:
dangers:
how its made:

Answer 3

uses: see in dark/ tv remotes/ ovens
dangers: burning
how its made: changes in the electrons of atoms

Question 4

visible light
uses:
dangers:
how its made:

Answer 4

uses: seeing
dangers: blinding?
how its made: changes in electrons of atoms

Question 5

ultra violet radiation
uses:
dangers:
how its made:

Answer 5

uses: detecting forgery (e.g. bank notes)/ tanning/ bacteria killing
dangers: skin cancer
how its made: changes in the electrons of atoms

Question 6

x- rays
uses:
dangers:
how its made:

Answer 6

uses: detecting broken bones/ security
dangers: mutation in the dna of cells (causes them to die or reproduce rapidly [cancer])
how its made: high speed electrons colliding with glass

Question 7

gamma rays
uses:
dangers:
how its made:

Answer 7

uses: treat cancer
dangers: mutation in the dna of cells (causes them to die or reproduce rapidly [cancer])
how its made: changes in the nucleus

Question 8

an example of a transverse wave

Answer 8

(🎶radio waves, microwaves, infrared radiation, physical light, ultra violet, x-rays, gamma rays🎵)

Question 9

example of a longitudinal wave?

Answer 9

sound waves 🔈🔉🔊

Question 10

what do waves transfer?

do they transfer matter?

Answer 10

they transfer energy

they dont transfer matter

Question 11

what type of wave is a sound wave and water wave?

Answer 11

mechanical wave

Question 12

what is the universal wave equation

Answer 12

v= f x lambda

Question 13

what does v = f λ mean

Answer 13

the speed of a wave = frequency x wavelength

Question 14

do light / shiny surfaces emit the most or least heat

Answer 14

least

Question 15

name seven energy stores

Answer 15

thermal
kinetic 
gravitational potential 
elastic potential 
chemical 
nuclear 
magnetic

Question 16

what’s the specific heat capacity

Answer 16

the amount of energy it takes to heat one kg of a substance by 1 degrees

Question 17

x-rays have a bigger or small wavelength than microwaves

Answer 17

smaller

Question 18

do gamma rays have a higher or lower frequency than radio waves

Answer 18

higher

Question 19

what wave has the highest energy

Answer 19

gamma rays

Question 20

give evidence for why the wave travels but not air

Answer 20

‘air does not move away from a vibrating tuning fork to creat a vacuum’

Question 21

name 3 non renewable energy sources

Answer 21

• coal
• oil
• (natural) gas

Question 22

name 7 renewable energy sources

Answer 22

• the sun (solar)
• wind
• water waves (like dams)
• hydro electricity
• biofuel
• tides
• geothermal

Question 23

what would the energy stores be when throwing a ball in the air

Answer 23

chemical to kinetic to gravitational potential to kinetic

Question 24

what’s specific latent heat

Answer 24

energy needed for 1kg of a substance to change state w/o temp change
THE THING WHERE THE GRAPH STAYS FLAT BC THEYRE BREAKING THE BONDS AND NOT CHANGING TEMP

Question 25

advantages of non renewable power

Answer 25

high in energy, provides more than renewable

large profits in the mining and selling

Question 26

what happens to wasted energy

Answer 26

it transfers it into heat energy which is dissipated