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Measuring Units and Choices

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Measuring Units and Choices

A group is setting up a science stand at a community event in Aotearoa New Zealand. Choose sensible metric units, convert measurements, and check whether the quantities make sense. Show your working where you can.

Choose a unit that fits

Select the most suitable unit for each job. Think about the size of the quantity.

1.The team needs to record the length of a folding table, about 1.8 ____. Which unit is most sensible?

2.A sealed bag of flour for an experiment has a mass of about 1 ____. Choose the best unit.

3.A small beaker holds about 250 ____. Choose the best unit.

Convert and calculate

Use the metric relationships: 1 m = 100 cm; 1 kg = 1,000 g; 1 L = 1,000 mL.

4.The stand needs 3.6 m of bunting. How many centimetres of bunting is that?

5.A container has 1,750 mL of water. Write this amount in litres.

6.Four packets each have a mass of 375 g. Calculate their total mass in kilograms.

7.The team buys 2.4 kg of apples and uses 650 g. How many grams of apples remain?

Measurement choices in context

Use units and tools that suit the job, and explain your reasoning.

8.Match each task to the most suitable unit: (1) distance between two towns; (2) mass of a kiwi fruit; (3) floor area of the stand; (4) water in a large tank. Units: A. m², B. km, C. g, D. L.

1. Distance between two towns
2. Mass of a kiwi fruit
3. Floor area of the stand
4. Water in a large tank

C. g
B. km
A. m²
D. L

9.The team must measure 12 m of cord laid out across the grass. Name one suitable measuring tool and explain why it works better than a 15 cm ruler.

10.A volunteer records the distance from the car park to the stand as 0.8 cm. Is this a sensible measurement? Correct the unit to one that would make sense for a distance across an event site, and explain briefly.

11.A dispenser contains 5 L of water. The team pours 8 bottles with 600 mL in each. How much water remains, in millilitres?

12.A rectangular display mat measures 2.4 m by 1.5 m. Work out its area in square metres. Then convert the area to square centimetres, using 1 m² = 10,000 cm².