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Very light things, like this feather, have their weight measured in grams.

Year 2 Measurements - Mass

Spot mass like a scientist! Learn to read scales, choose grams or kilograms, estimate sensibly, and check increments so your measurements are accurate every time.

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Fascinating Fact:

Read the scale. Look at the numbers and the little lines. If each small line is 50 g, five lines is 250 g.

In KS1 Maths, pupils compare mass using grams (g) and kilograms (kg). They estimate first, then read scales carefully by spotting the interval each small line represents.

Key Terms

Mass: How heavy something is.
Gram (g): A small unit for mass, used for light objects.
Kilogram (kg): A larger unit for mass; 1 kg = 1,000 g.

Practice measuring: Numeracy Game – quick challenges that include reading scales and real-life problems.

Frequently Asked Questions (Click to see answers)

How do I read a weighing scale in KS1?

Find two numbered marks, count how many small lines between them, then work out the value of each line. Land on the nearest line and read the mass.

When should I use grams and when kilograms?

Use grams for small, light items like fruit or crayons. Use kilograms for heavier things like a pet carrier or a big bag of rice.

What does “interval” on a scale mean?

The interval is how much each small line is worth. If ten lines go from 0 to 500 g, each line is 50 g.

Try These Related Quizzes

To see a larger image, click on the picture.

Question 1

What could be the combined weight of the dog and cat?

35g

3kg

25kg

305g

The dog might weigh about 20kg and the cat might weigh about 5kg

Question 2

How much might this little mouse weigh?

20kg

20g

2kg

Mice are very light and certainly wouldn't weigh kilograms!

Question 3

How heavy might the toy truck be?

300kg

300g

30kg

The truck is probably less than a kilogram

Question 4

How heavy might one of these apples be?

60g

60kg

6kg

Most apples are less than 100g

Question 5

How much might one of these books weigh?

300kg

300g

3kg

An average book weighs less than a kilogram

Question 6

How heavy might one of the lunch boxes be?

10kg

10g

100kg

1kg

The lunch box would be too heavy to carry if it was 100kg!

Question 7

How much could the go kart weigh?

80g

8kg

80kg

All the other weights are far too light

Question 8

How heavy could this elephant be?

500g

5kg

5000kg

Elephants are very heavy indeed!

Question 9

How much might these children weigh altogether?

100g

100kg

1000kg

10g

Each child could have an average weight of 25kg, so 4 of them would weigh 100kg

Question 10

How much might this butterfly weigh?

1kg

10kg

100g

Butterflies have to be very light in order to fly!

Author: Angela Smith (Primary School Teacher & KS1 Quiz Writer)

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