science

• what are the diffrences between renewable and non-renewable resources


  renewable: examples: hydropower,solar,wind

  wont run out

  good for the enviroment

  non-renewable: examples: coal,oil,nuclear

  will run out

  bad for the enviroment
• what is a displacement reaction?

  a type of reaction where a more reactive element displaces a less reactive
• what is the reactivity series

  the order in which substances are placed based on how reactive they are
• what process put carbon dioxide into the atmosphere


  respiration: glucose+oxygen arrow: carbon dioxde+water
• what is a carbon sink

  a place that absorbs and stores carbon
• what are examples of carbon sinks

  ocean , animals ,tree/plants
• greenhouse effect

  transfer of the suns energy to the thermal store gases in the earths atmosphere
• global warming 


  gradual increase in the air temprature of the earth
• what is an ore?

  a naturally occuring rock that contains enough minerals to make it worth getting the mineral and then the metal it includes out of the rock
• what processes take carbon dioxide out of the atmosphere

  photosynthesis

  dissolving in the ocean
• what is the atmosphere

  a mixture of gases that surround the earth
• name the order of the electromagnetic spectrum


  1-radiowaves

  2-microwaves

  3-infared

  4-ultraviolet

  5-x-rays

  6-gamma rays
• as you go right in the electromagnetic spectrum the

  frequency increases
• as you go left in the electromagnetic spectrum the

  wavelength increases
• refraction

  a wave changing direction and speed as it passes from one medium to another
• areas of high pressure in a sound wave are called

  compressions
• areas of low pressure in a sound wave are called

  rarefractions
• how is ionisation caused

  when there is high energy waves which cause electrons to be knocked off atoms in a cell
• sounds waves travel faster in

  liquids and solids
• how to increase the strength of an electromagent

  add coils

  increase current

  use a magnetic core
• name some uses of electromagnets


  levitating trains

  moving motors

  pick up scrap items
• what is a magnetic field

  the area a magnetic that experiences magnetic force
• what is ultrasound used for

  dog whistle,pregnancy scan ,echolation
• what is an solenoid

  a coiled wire that conducts electricity
• what is the amplitude


  resting point to peak/trough of a wave
• frequency

  the amount of waves passing a point per second
• decribe the features of a longitudinal wave

  moves forwards and backwards

  energy moving parrarlel to the vibrations
• describe the features of a transverse wave 


  moves up and down

  energy moves at a 90 degrees angle
• example of transverse

  electromagnetic wave

  mexican wave
• example of longitudinal wave


  sound wave

  earthquakes
• natural magnets


  iron

  nicklet

  copper
• how to find the shape of magnetic field l


  using plotting compasses- the needle of a compass lines up with the magnetic field

  using iron fillings-the fillings line up with the magnetic field
• the closer the magnetic field lines the 


  stronger the magnetic force
• at the pulse there is 


  the strongest magnetic effect
• unit of resistance


  omphs
• electric field

  an area on which electricity can act
• draw and label a wave on a piece of paper

  must have

  wavelength

  amplitude

  peak

  trough
• recycling

  the process of collecting and processing items that have already been used so they can be used again
• 6-MARKS "EXPLAIN THE CAUSES AND EFFECTS OF CLIMATE CHANGE"

  criteria:

  describe what the greenhous effect and climate change is

  explain the causes of climate change

  explain the possible long term effects of climate change
• how to test for starch?

  add iodine solution

  if it goes from orange to blue black starch is present