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Solar Oven Measurement Challenge

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Solar Oven Measurement Challenge

At the zoo, Tui, Mere and Finn are testing a solar oven for warming a small snack. Use the measurements and test results below. Show your working and include units where needed.

Plan and measure

The oven base is a rectangle measuring 32 cm by 24 cm. Its reflector flap measures 21.6 cm by 16.3 cm.

1.Which tool is best for measuring the length of the oven base?
  • Thermometer
  • Ruler or tape measure
  • Measuring jug
  • Stopwatch
2.Find the area of the rectangular oven base. Include the correct unit.
3.Round each flap measurement to the nearest whole centimetre: 21.6 cm and 16.3 cm.
4.The reflector is covered with foil on one side. Estimate the area of foil needed using your rounded flap measurements. Show the multiplication.

Run the temperature test

The team records the oven temperature every five minutes. Temperatures are measured in degrees Celsius (°C).

Time (min)

Temperature (°C)

0

18.5

5

23.0

10

29.6

15

34.2

5.How much did the temperature increase from the start to 15 minutes? Write a number sentence and include °C.
6.Between which five-minute interval did the temperature rise the most? Calculate all three increases to check.
7.At 10 minutes, was the oven warmer or cooler than 30°C, and by how much?
8.True or false: A thermometer is the suitable tool for measuring the oven’s temperature.
TrueFalse
9.The team wants to compare two oven designs fairly. Name one measurement they should keep the same in both tests and explain why.
10.Give one way using a solar oven could help reduce the use of non-renewable energy.

2 printable pages

  • Solar Oven Measurement Challenge, page 1 of 2: Plan and measure, Run the temperature test

    Page 1

  • Solar Oven Measurement Challenge, page 2 of 2: 0 18.5

    Page 2

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