science

• peer review


  other scientists check results and scientific explanations to make sure they're scientific before published
• a hazard is something that could potentially cause harm
• potential hazards

  • microorganisms
  • chemicals
  • fire
  • electricity
• repeatable evidence


  if the same person does the experiment again using the same methods and equipment, they'll get similar results
• reproduceable evidence


  if someone else does the experiment or a different method or piece of equipment is used, the results will still be similar
• valid evidence


  repeatable and reproducible and answer the original question
• independent variable


  changes
• dependent variable


  measured when independent variable changes
• control variables


  kept the same
• repeat experiments at least three times to check repeatability
• random errors


  unpredictable errors which can be caused by human errors in measuring
• systematic errors


  if the measurement is wrong by the same amount every time
• zero error


  equipment isn't set to zero
• anomalous result

  a result that doesn't fit in
• significant figures


  first sig fig is the first digit that isnt 0
• bar charts should be use if the independent variable is categoric or discrete
• if both variables are continuous you should use a bar chart
• • dependant variable on the y axis
  • independent variable on the x axis
• the gradient of a graph tells you how quicky the dependent variable changed if you change the independent variable
• gradient = $\frac{change\ in\ y}{change\ in\ x}$
• correlation

  A) positive

  B) negative

  C) no

  
• mass

  
• energy

  
• volume

  
• length

  
• drawing conclusions

  • what pattern is there between independent and dependent variables
  • refer back to hypothesis
• evaluations

  • was the method valid and fair?
  • were the results repeatable, reproducible, accurate and precise?
  • were there any anomalies?
  • include changes you'd make
• writing a method

  • bullet points
  • exact measurements
  • point out the obvious
  • logical steps
  • control variables