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Combined science (Higher)
States of matter

Starter quiz

  • Which of these are essential things you need to do when planning an experiment?
    • work out which safety precautions are needed  ✓
    • complete a trial run of the experiment
    • if needed, prepare a table to record results  ✓
    • put equipment together
    • map out a step-by-step method  ✓
  • Put the following steps in order to describe a method for collecting data to plot a heating curve of the solid substance shown in the boiling tube. Begin with 'collect all the equipment'.
    Put the following steps in order to describe a method for collecting data to plot a heating curve of the solid substance shown in the boiling tube. Begin with 'collect all the equipment'.
    • 1
      ⇔
      collect all the equipment on the equipment list
    • 2
      ⇔
      set up all the equipment as shown, with the Bunsen not yet heating the water
    • 3
      ⇔
      record the initial temperature of the substance
    • 4
      ⇔
      start the timer and start heating with the Bunsen at the same moment
    • 5
      ⇔
      record the temperature every 30 seconds until the water is boiling
    • 6
      ⇔
      note times and temperature at which the solid substance starts to melt
    • 7
      ⇔
      leave the equipment to cool before dismantling it and tidying away
  • What is a gauze used for? On this diagram, it is represented by the wavy line between the tripod and the beaker.
    What is a gauze used for? On this diagram, it is represented by the wavy line between the tripod and the beaker.
    • to spread out the heat over the base of the beaker  ✓
    • to make sure the Bunsen burner cannot touch the tripod
    • to make the platform of the tripod a square shape
    • to prevent the water bath from overheating
    • to make the beaker more stable and less likely to fall  ✓
  • A table for results should include columns to record independent and dependent variables and and other necessary information. The dependent variable is usually recorded in the ______ column.
    • 'second' ✓
  • Which safety precautions are needed for a heating curve experiment, in which a solid is melted in a water bath, with its temperature measured over time?
    • placing the equipment in the middle of the bench  ✓
    • standing up during the experiment  ✓
    • opening windows to remove fumes
    • putting all stools underneath the bench  ✓
    • wearing eye protection  ✓
  • When transferring information from a results table to a graph, which variable should be plotted along the x-axis?
    When transferring information from a results table to a graph, which variable should be plotted along the x-axis?
    • control variable
    • dependent variable
    • independent variable  ✓
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