📏 Part 1: Estimation and Measurement

For each item below, first record your estimate, then the actual measurement. Always include correct units!

1. Estimate and measure the length of your pencil.

Estimate: _________________ Actual measurement: _________________

2. Estimate and measure the width of your desk.

Estimate: _________________ Actual measurement: _________________

3. Estimate and measure the mass of your pencil case.

Estimate: _________________ Actual measurement: _________________

4. Estimate and measure the capacity of a water bottle on your desk.

Estimate: _________________ Actual measurement: _________________

5. What is the current room temperature?

Estimate: _________________ °C Actual measurement: _________________ °C

6. For each measurement above, which tool did you use? Match the measurement to the correct tool.

Length of pencil

Mass of pencil case

Capacity of bottle

Room temperature

Thermometer

Ruler

Measuring jug

Balance scales

🔄 Part 2: Unit Conversions

Convert the following measurements. Show your working in the space provided.

7. Complete the conversions:

a) 3.5 km = _________________ m

b) 450 cm = _________________ m

c) 2,800 g = _________________ kg

d) 2.5 L = _________________ mL

e) 85 mm = _________________ cm

8. Liam is baking a cake. The recipe needs 1.25 kg of flour, but his scales measure in grams. How many grams of flour does he need? Show your working.

9. Which unit would be most appropriate for each measurement? Circle the best answer.

a) The distance from Auckland to Wellington:

millimetres (mm)

metres (m)

kilometres (km)

b) The mass of a feather:

grams (g)

kilograms (kg)

tonnes (t)

📐 Part 3: Angles

10. Classify each angle as acute, right, obtuse, or reflex.

a) 45° → _________________

b) 90° → _________________

c) 130° → _________________

d) 210° → _________________

11. Use a protractor to measure the angle below, then classify it.

Measured angle: _________________ ° Classification: _________________

12. Explain in your own words: why is it important to use the correct units and tools when measuring? Give one real-life example to support your answer.