Planning investigations

• Independent variable is the factor we can change
• Dependant variable is what we measure
• Control variable is what we have to keep the same if we dont it will affect the dependant variable
• Accurate data is close to the value of what your trying to measure
• Precise data gives you similar results if you repeat the exp
• When making a plan

  you need to include the hypothesis which is the question you’re trying to answe

  method needs to be in a logical order

  equipment and how to use it

  prediction
• in experiments data can come in three ways

  continuous= any value

  discrete= can only be a whole number

  categoric= where the value is a word
• Risked assessment is a careful examination of what could cause harm to people during scientific investigations
• Hazard is something that causes harm
• Risk is the chance of high or low that someone can be harmed
• preventation methods ate strategies that are put in place to prevent any dange
• Reproductivity means obtaining same results under slightly different conditions
• Repeatability means obtain same results under identical conditions