📏 Part 1: Units and Systems

1. Which unit would be most appropriate for measuring the height of your classroom?

millimetres

centimetres

metres

kilometres

2. Which of these are metric units? (Select all that apply)

kilograms

inches

litres

pounds

millimetres

3. Complete the following conversions:

a) 2.5 kg = ________ g

b) 1500 mL = ________ L

c) 350 cm = ________ m

d) 0.75 L = ________ mL

4. Match the imperial unit to its approximate metric equivalent:

1 inch ≈ ________ cm

1 pound ≈ ________ g

1 pint ≈ ________ mL

🔄 Part 2: Problem Solving

5. Sarah is baking a cake. The recipe calls for 250g of flour, but her measuring cup only shows ounces. Explain why she might need to convert between measurement systems.

6. A bottle contains 2.5 litres of water. How many 250mL glasses can be filled from this bottle? Show your working.

7. Why does New Zealand primarily use the metric system, but we still encounter imperial units in some situations? Give two examples of where you might see imperial units.

🎯 Part 3: Extension Challenge

8. Advanced: A construction project requires 3.2 tonnes of concrete. The supplier measures in kilograms. How many kilograms of concrete are needed? (Hint: 1 tonne = 1000 kg)

9. Real-world Application: Choose an object in your classroom and describe how you would measure its length, mass, and volume (if applicable). Justify your choice of units and measuring tools.