Measures, time and graphs
Grams, millilitres and a fair biscuit test
Does changing one measurement change how far the mixture goes?
Watch first
Measuring round the edge, covering the inside, then reading the clock.
Read the film in words (English) ↓
What the film shows
- A finger traces the edge of a rectangle while the perimeter total counts up.
- The same rectangle fills with unit squares to show its area.
- Units convert on screen: centimetres to metres, grams to kilograms, millilitres to litres.
- A 12-hour clock and a 24-hour clock show the same moment side by side, then a bar chart is read off.
- The perimeter and unit-swap practicals for this unit repeat all of this with a tape measure.
What you need
Tick each one as you find it — 0 of 7 ready.
Stay safe: Do not bake this or eat it. Ask before using kitchen ingredients and clear up afterwards.
Plan the fair test
- Change: How much water you add
- Measure: How many tablespoons of mixture you get
- Keep the same: Same 200 g of dry mix, same bowls, same stirring time, level spoons only
Objectives this evidences
- Convert between different units of measure, for example kilometre to metre and hour to minute
- Solve comparison, sum and difference problems using information presented in bar charts, pictograms, tables and other graphs
Do it, one step at a time
Step 1 of 5
- Step 1. Weigh 200 g of dry mix into each bowl. Write 200 g in kilograms as well: 0.2 kg.
- Step 2. Add 100 ml of water to the first bowl and 150 ml to the second. Write both in litres too.
- Step 3. Stir each for the same 30 seconds, then count how many level tablespoons each bowl gives.
- Step 4. Record everything in a table with both units side by side, grams next to kilograms and millilitres next to litres.
- Step 5. Draw a bar chart of the two spoon counts and write one sentence saying which mix went further.
What should happen
More water gives more spoonfuls but a runnier mix. Writing 150 ml as 0.15 l makes the two amounts easy to compare.
Think about: You changed only one thing. Why would the test be unfair if you had also changed the stirring time?
Write up your result
A sentence or two is enough to save it.
The lessons behind this practical
Each one opens with the same short film, and the film has a written transcript underneath if reading is easier than watching.
Now the quiz for this topic
Questions come from the lessons behind this practical, so nothing is asked that has not been taught.
Quiz
Measures, time and graphs quiz
14 questions from the lessons in this stage. No timer, and you can try again as many times as you like.