📏 Part 1: Standard vs Non-Standard Units

1. Circle the standard units of measurement:

Metres

Footsteps

Kilograms

Paperclips

Litres

Hand spans

2. Explain why we use standard units instead of non-standard units:

🔢 Part 2: Metric System Prefixes

3. Fill in the blanks with the correct prefix meanings:

kilo- means _____________ times bigger

centi- means _____________ times smaller

milli- means _____________ times smaller

4. Convert these metric measurements:

a) 2500 mL = _______ L

b) 3.5 km = _______ m

c) 750 g = _______ kg

d) 45 cm = _______ mm

e) 1.2 kg = _______ g

5. Order these measurements from smallest to largest:

2.5 L, 500 mL, 3500 mL, 1.8 L, 750 mL

📐 Part 3: Choosing Appropriate Units

6. Choose the most suitable metric unit for measuring each item. Circle your answer:

Height of a door: millimetres / centimetres / metres / kilometres

Mass of a pencil: milligrams / grams / kilograms

Distance between Auckland and Wellington: millimetres / metres / kilometres

Amount of water in a swimming pool: millilitres / litres / kilolitres

Thickness of a coin: millimetres / centimetres / metres

Mass of a car: grams / kilograms / tonnes

7. Estimate the measurements (write your estimate with appropriate units):

Length of your classroom: _____________

Mass of your school bag: _____________

Capacity of a drink bottle: _____________

Height of your teacher: _____________

🌍 Part 4: Imperial and Metric Systems

8. Match the imperial units with their approximate metric equivalents:

1. 1 inch

2. 1 foot

3. 1 pound

4. 1 gallon

A. 4.5 litres

B. 30 centimetres

C. 2.5 centimetres

D. 450 grams

9. Check all the places where you might still see imperial units used in New Zealand:

TV screen sizes (inches)

Road speed limits

Cooking recipes (cups, ounces)

Petrol prices

Building materials (timber sizes)

Body weight (pounds)

🧠 Part 5: Extension Activities

10. Multi-step conversion problem:

Sarah runs 2.5 kilometres every morning. How many metres does she run in one week?

11. Word problem:

A recipe calls for 750 mL of milk, but you only have a measuring cup marked in litres. How much milk do you need to measure? If you accidentally use 1.2 L instead, how much extra milk have you added?

12. Real-world application:

You're buying fabric that costs $15.50 per metre. The fabric is 150 cm wide and you need a piece that is 80 cm long. How much will you pay? (Show all working)

13. Design challenge:

Create your own non-standard unit of measurement. Draw it below and explain what you would use it to measure and why: