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3.4 Volume and Capacity

Mathematics · Grade 7 · 8 lessons in the design

What this covers

  • The metre cube (m³) as a unit of volume
  • Conversions between cubic metres (m³) and cubic centimetres (cm³)
  • Volume of a cube
  • Volume of a cuboid
  • Volume of a cylinder
  • Relationship between cm³, m³ and litres
  • Relating volume to capacity
  • Capacity of containers in real-life: tanks, packets, jerrycans and consumer packaging

What you will be able to do

  • identify metre cube (m³) as a unit of volume in measurements
  • convert metre cube (m³) into centimetre cube (cm³) and vice versa in different situations
  • work out the volume of cubes, cuboids, and cylinders in different situations
  • identify the relationship between cm³, m³ and litres in real-life situations
  • relate volume to capacity in real-life situations
  • work out the capacity of containers in real-life situations
  • promote the use of volume and capacity in real-life situations

Key questions

“Where do we use volume and capacity in daily activities?”

“Why do we measure volume?”

Lessons

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  1. The metre cube
    40 min · 1 practice tasks · quiz
    Identify the cubic metre as the SI unit of volume by building a 1 m stick cube and comparing it with a 1 cm cube.
  2. Converting m³ and cm³
    40 min · 1 practice tasks · quiz
    Convert cubic metres to cubic centimetres and back using 1 m³ = 1 000 000 cm³.
  3. Volume of a cube
    40 min · 1 practice tasks · quiz
    Work out the volume of a cube as the edge cubed, keeping all three edges in the same unit.
  4. Volume of a cuboid
    40 min · 1 practice tasks · quiz
    Work out the volume of a cuboid as length times width times height, including classrooms, stores and cartons.
  5. Volume of a cylinder
    40 min · 1 practice tasks · quiz
    Work out the volume of a cylinder as πr²h using 22/7 or 3.14, from radius not diameter.
  6. Cubic centimetres, cubic metres and litres
    40 min · 1 practice tasks · quiz
    Identify 1 L = 1000 cm³ and 1 m³ = 1000 L, and convert among cm³, m³ and litres.
  7. Volume and capacity
    40 min · 1 practice tasks · quiz
    Relate volume (space occupied) to capacity (how much a container can hold), including empty, half-full and full containers.
  8. Capacity of containers
    40 min · 1 practice tasks · quiz
    Work out the capacity of tanks, tins and packets, count how many small packs fill a larger container, and read labels as a consumer.