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Physical quantities and measurement techniques

Physical quantities and measurement techniques

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Question 9

A class of students is investigating the factors that affect the rate at which substances dissolve in water.

Each student is able to use:

  • glass beakers,
  • a thermometer,
  • a stopclock,
  • a measuring cylinder,
  • an electronic balance,
  • a supply of granulated sugar,
  • a supply of water,
  • a stirrer,
  • a method of heating the water

and any other common laboratory apparatus that may be useful.

A student decides to investigate the effect of the starting temperature of the water on the time taken for the sugar to completely dissolve.

a.

Suggest three possible variables that should be kept constant in this investigation.

[3]
b.

In the table below, write the names of three items of apparatus that are necessary in order to take readings in this investigation. In the second column, write the quantity that each item measures.

Item of apparatusQuantity measured
1.
2.
3.
[3]
Markscheme

Physical quantities and measurement techniques Questions

  1. IGCSE
  2. /Physics
  3. /Physical quantities and measurement techniques

164 exam-style questions on CIE IGCSE Physics Physical quantities and measurement techniques, covering Physical quantities and measurement techniques. Each one has a worked solution and a mark scheme showing where the marks go.

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