Primary 2 Mathematics Length Mass Volume Quiz

Primary 2 Mathematics Quiz - Length Mass Volume: Answer Key

Total Marks: 30

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Section A: Length (Questions 1 to 5)

Question 1

Answer: m Marks: 1

Explanation: Length is measured in metres (m). The abbreviation for metre is "m". Kilograms (kg) measure mass, and litres (ℓ) measure volume. A skipping rope is a long object, so we measure its length in metres.

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Question 2

Answer: cm Marks: 1

Explanation: A pencil is a short object, so we measure its length in centimetres (cm). The abbreviation for centimetre is "cm". Metres (m) are used for longer lengths, and kilograms (kg) measure mass. A pencil is about 15 cm long.

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Question 3

Answer: 3 Marks: 1

Explanation: When comparing lengths, the longer length is the larger number. 3 m is longer than 2 m because 3 is greater than 2. So the ribbon of length 3 m is longer.

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Question 4

Answer: 3 m Marks: 1

Explanation: To find how much longer the second piece of string is, we subtract the shorter length from the longer length. 8 m − 5 m = 3 m The second piece of string is 3 m longer.

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Question 5

Answer: 5 m Marks: 1

Explanation: To find the total length, we add the two lengths together. 4 m + 1 m = 5 m The total length of the snake and the lizard is 5 m.

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Section B: Mass (Questions 6 to 10)

Question 6

Answer: kg Marks: 1

Explanation: Mass is measured in kilograms (kg) or grams (g). A bag of rice is heavy, so we measure its mass in kilograms (kg). The abbreviation for kilogram is "kg". Metres (m) measure length, and litres (ℓ) measure volume.

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Question 7

Answer: g Marks: 1

Explanation: A paper clip is very light, so we measure its mass in grams (g). The abbreviation for gram is "g". Kilograms (kg) are used for heavier objects. A paper clip has a mass of about 1 g.

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Question 8

Answer: watermelon Marks: 1

Explanation: When comparing masses, the heavier object has the larger mass. 3 kg is heavier than 2 kg because 3 is greater than 2. So the watermelon is heavier.

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Question 9

Answer: 3 kg Marks: 1

Explanation: To find the total mass, we add the two masses together. 2 kg + 1 kg = 3 kg The total mass of the two bags is 3 kg.

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Question 10

Answer: 3 kg Marks: 1

Explanation: To find how much heavier one object is than another, we subtract the smaller mass from the larger mass. 7 kg − 4 kg = 3 kg The box of books is 3 kg heavier than the box of toys.

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Section C: Volume (Questions 11 to 15)

Question 11

Answer: ℓ Marks: 1

Explanation: Volume of liquid is measured in litres (ℓ). The abbreviation for litre is "ℓ". Metres (m) measure length, and kilograms (kg) measure mass. A bottle contains liquid, so we measure its volume in litres.

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Question 12

Answer: mℓ Marks: 1

Explanation: A small bottle of medicine contains a very small amount of liquid, so we measure its volume in millilitres (mℓ). The abbreviation for millilitre is "mℓ". Litres (ℓ) are used for larger volumes. A small bottle of medicine contains about 5 mℓ of liquid.

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Question 13

Answer: B Marks: 1

Explanation: When comparing volumes, the larger volume is the larger number. 4 ℓ is more than 2 ℓ because 4 is greater than 2. So Bottle B contains more water.

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Question 14

Answer: 5 ℓ Marks: 1

Explanation: To find the total volume, we add the two volumes together. 3 ℓ + 2 ℓ = 5 ℓ The total volume of orange juice in both jugs is 5 ℓ.

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Question 15

Answer: 4 ℓ Marks: 1

Explanation: To find how much more water is in one container than another, we subtract the smaller volume from the larger volume. 9 ℓ − 5 ℓ = 4 ℓ The fish tank has 4 ℓ more water than the bucket.

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Section D: Comparing and Solving (Questions 16 to 20)

Question 16

Answers: (a) 9 m (b) 3 m Marks: 3 (1 mark for each correct part, 1 mark for correct working)

Explanation: (a) To find the total length, we add the two lengths together. 6 m + 3 m = 9 m

(b) To find how much longer the rope is, we subtract the shorter length from the longer length. 6 m − 3 m = 3 m

Marking Notes:

• Award 1 mark for each correct final answer.
• Award 1 mark for correct working shown (e.g., writing the addition or subtraction equation).

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Question 17

Answers: (a) 7 kg (b) 3 kg Marks: 3 (1 mark for each correct part, 1 mark for correct working)

Explanation: (a) To find the total mass, we add the two masses together. 5 kg + 2 kg = 7 kg

(b) To find how much heavier the bag of potatoes is, we subtract the smaller mass from the larger mass. 5 kg − 2 kg = 3 kg

Marking Notes:

• Award 1 mark for each correct final answer.
• Award 1 mark for correct working shown (e.g., writing the addition or subtraction equation).

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Question 18

Answers: (a) 10 ℓ (b) 4 ℓ Marks: 3 (1 mark for each correct part, 1 mark for correct working)

Explanation: (a) To find the total volume, we add the two volumes together. 7 ℓ + 3 ℓ = 10 ℓ

(b) To find how much more water is in the first container, we subtract the smaller volume from the larger volume. 7 ℓ − 3 ℓ = 4 ℓ

Marking Notes:

• Award 1 mark for each correct final answer.
• Award 1 mark for correct working shown (e.g., writing the addition or subtraction equation).

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Question 19

Answers: (a) 5 m (b) 3 m Marks: 3 (1 mark for each correct part, 1 mark for correct working)

Explanation: (a) To find the length left after cutting, we subtract the cut length from the original length. 9 m − 4 m = 5 m

(b) To find the final length after the second cut, we subtract the second cut length from the remaining length. 5 m − 2 m = 3 m

Marking Notes:

• Award 1 mark for each correct final answer.
• Award 1 mark for correct working shown (e.g., writing the subtraction equations).

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Question 20

Answers: (a) Apple (b) 350 g (c) 50 g Marks: 3 (1 mark for each correct part)

Explanation: (a) To find the heaviest fruit, we compare the masses: 200 g, 150 g, and 180 g. The largest number is 200, so the apple is the heaviest.

(b) To find the total mass of the apple and the pear, we add their masses together. 200 g + 150 g = 350 g

(c) To find how much heavier the apple is than the pear, we subtract the pear's mass from the apple's mass. 200 g − 150 g = 50 g

Marking Notes:

• Award 1 mark for each correct part.
• For part (b) and (c), accept correct working shown even if the final answer has a minor arithmetic error (award ½ mark for working, ½ mark for correct answer).

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End of Answer Key