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Questions and Answers
An object's mass is measured as 3 kg and 250 g. What is an equivalent way to express this mass?
An object's mass is measured as 3 kg and 250 g. What is an equivalent way to express this mass?
- Three and a quarter kilograms (correct)
- Two and a half kilograms
- Three and a half kilograms
- Two and three quarter kilograms
If a scale is divided into 5 equal intervals between 0 kg and 1 kg, what mass does each interval represent?
If a scale is divided into 5 equal intervals between 0 kg and 1 kg, what mass does each interval represent?
- 100 g
- 500 g
- 200 g (correct)
- 250 g
A scale shows that a bag of apples has a mass between 2 kg and 3 kg. If the arrow is pointing exactly halfway between these two markings, what is the mass of the apples?
A scale shows that a bag of apples has a mass between 2 kg and 3 kg. If the arrow is pointing exactly halfway between these two markings, what is the mass of the apples?
- 2 kg and 500 g (correct)
- 3 kg and 500 g
- 2 kg and 750 g
- 2 kg and 250 g
A baker uses 1 kg of flour to bake two cakes. Each cake requires the same amount of flour. How many grams of flour are in each cake?
A baker uses 1 kg of flour to bake two cakes. Each cake requires the same amount of flour. How many grams of flour are in each cake?
Which of the following is the most reasonable mass for a textbook?
Which of the following is the most reasonable mass for a textbook?
What is the total mass of two objects, one with a mass of 1 kg and 600 g, and the other with a mass of 2 kg and 400 g?
What is the total mass of two objects, one with a mass of 1 kg and 600 g, and the other with a mass of 2 kg and 400 g?
A watermelon's mass is shown on a scale. The scale markings increase by 200g each. If the watermelon's mass falls between the 3 kg and 4 kg marks and lands two markings after the 3 kg, what is the watermelon's mass?
A watermelon's mass is shown on a scale. The scale markings increase by 200g each. If the watermelon's mass falls between the 3 kg and 4 kg marks and lands two markings after the 3 kg, what is the watermelon's mass?
Sarah has one 5 kg bag of sugar. She uses 750 g of sugar to bake cupcakes. How much sugar is left in the bag?
Sarah has one 5 kg bag of sugar. She uses 750 g of sugar to bake cupcakes. How much sugar is left in the bag?
A set of weights includes 1 kg, 500 g, and 200 g weights. What is the heaviest item you can measure using only these weights, assuming you have one of each weight?
A set of weights includes 1 kg, 500 g, and 200 g weights. What is the heaviest item you can measure using only these weights, assuming you have one of each weight?
Tom wants to measure an object with a mass of 3 kg and 800 g using a balance scale. He has a 2 kg weight. How much more weight does he need?
Tom wants to measure an object with a mass of 3 kg and 800 g using a balance scale. He has a 2 kg weight. How much more weight does he need?
Flashcards
What is mass?
What is mass?
The amount of matter in an object, measure in kilograms (kg) and grams (g).
Kilograms to Grams
Kilograms to Grams
1 kilogram (kg) is equal to 1000 grams (g).
Fractions of Kilograms
Fractions of Kilograms
Half of a kilogram is 500 grams. A quarter of a kilogram is 250 grams.
Reading Mass
Reading Mass
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1 Kilogram (kg)
1 Kilogram (kg)
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Measure mass
Measure mass
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Study Notes
- This lesson focuses on measuring mass in kilograms and grams, including fractions of kilograms
- Year 2 students measured mass in whole kilograms, but Year 3 students measure in kilograms and grams
Key Concepts
- An object might weigh 2 kg and 500 g, which is equivalent to two and a half kilograms
- Measurements should be read as "x kg and y g"
- Decimals are not used until Year 4
- 1,000 g equals 1 kg which can be used to determine the amounts of grams on a divided kilogram scale
Things to avoid
- Confusing relationships between units like cm and m, or assuming 100 g equals 1 kg
- Assuming scales always increase in the same intervals
- Mixing up units when writing measurements, like writing 2 kg and 300 g as 2 g and 300 kg
Key Questions
- What is mass?
- What are kilograms and grams, and how do they differ?
- How many grams are in 1 kg?
- How many grams are in half or a quarter of a kilogram?
- How can the exact mass of an object between two whole kilograms be measured?
Sentence Starters
- The mass is between _ kg and _ kg.
- There are _ intervals.
- Each interval is worth _ g.
- The mass is _ kg and _ g.
- The arrow on the scale is pointing to _ kg and _ g.
- The object has a mass of _ kg and _ g.
National Curriculum Links
- Relates to measuring, comparing, adding, and subtracting lengths (m/cm/mm) and mass (kg/g), volume/capacity (l/ml)
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