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Measurement Mastery Worksheet

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Measurement Mastery Worksheet

Help Aisha, Wiremu and Tui plan a safe rock-pool survey at low tide. Use metric units, show calculations where asked, and include units in every measurement answer.

Plan the survey

The team records observations without removing animals from their pools.

1.Aisha measures a narrow channel that is 2.35 m long. Convert its length to centimetres.

2.Wiremu’s tape measure shows 486 cm across a pool. How many metres is this? Give your answer to two decimal places.

3.Tui estimates a pool is 1.8 m long. The measured length is 2.1 m. By how much was the estimate out, and was it an overestimate or an underestimate?

Observation

Measurement

Useful unit

Pool depth

0.42

metres

Small shell mass

grams

Water temperature

degrees Celsius

4.The team needs the pool depth in millimetres for a detailed sketch. Convert 0.42 m to millimetres.

5.Which tool is most suitable for checking the water temperature: a ruler, a thermometer, or balance scales? Explain what it measures.

Ruler
Thermometer
Balance scales

Make sense of measurements

Use conversions and angle knowledge to make the survey notes clear.

6.Aisha pours 1.65 L of seawater into a marked container for a non-living sample. How many millilitres is this?

7.The sample container has a capacity of 2 L. After adding 1,650 mL, how much capacity remains? Give your answer in millilitres.

8.A safe observation point is 750 m from the car park. Express this distance in kilometres.

9.A crack in a rock is 38 mm long. Convert this length to centimetres.

10.The angle between two edges of a rock ledge is 128°. Classify the angle as acute, right, obtuse or reflex.

Acute
Right
Obtuse
Reflex

11.A compass arm turns through 215° while the team maps a route around a pool. Classify this angle.

12.The group has one ruler marked in millimetres and one tape measure marked in centimetres. Explain why writing the unit beside each measurement matters. Give one example from the survey.