Grade 3 Math Practice Test: Mass and Liquid Volume
- Mass and Liquid Volume
- 10 questions
- 12 minutes
These 10 questions practice grams, kilograms and liters, plus word problems that add, subtract, multiply or divide these amounts. Tip: a paper clip has a mass of about 1 gram, and a large water bottle holds about 1 liter.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
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Question 1
What is the best estimate for the mass of a paper clip?
Correct answer: D
A paper clip is very light, so its mass is about 1 gram. 1 kilogram is 1,000 grams, about the mass of a large dictionary.
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Question 2
Which of these containers holds about 1 liter of liquid when it is full?
Correct answer: A
A large water bottle holds about 1 liter. A teaspoon holds much less, while a bathtub and a swimming pool hold far more.
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Question 3
What is the best estimate for the mass of a child's bicycle?
Correct answer: D
A bicycle is heavy enough to measure in kilograms, and about 12 kilograms is reasonable. 12 grams is as light as a few coins, and 120 kilograms is heavier than most adults.
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Question 4
A bag of apples has a mass of 3 kilograms. A bag of potatoes has a mass of 5 kilograms. What is the total mass of the two bags?
Correct answer: C
Add the masses: 3 kg + 5 kg = 8 kg. 2 kg is the difference, and 8 grams uses the wrong unit.
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Question 5
One jug holds 4 liters of water. How many liters do 6 of these jugs hold when they are all full?
Correct answer: B
6 jugs of 4 liters is 6 × 4 = 24 liters. 10 liters comes from adding 6 + 4 instead of multiplying.
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Question 6
A fish tank has 35 liters of water. Mr. Diaz pours out 12 liters to clean it. How much water is left in the tank?
Correct answer: A
Subtract: 35 − 12 = 23 liters. 47 liters adds the amounts, but water was taken out.
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Question 7
Three boxes have the same mass. Together they have a mass of 27 kilograms. What is the mass of one box?
Correct answer: A
Divide the total into 3 equal parts: 27 ÷ 3 = 9 kg. 81 kg comes from multiplying 27 × 3.
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Question 8
A dog has a mass of 18 kilograms. A cat has a mass of 4 kilograms. How much greater is the dog's mass than the cat's mass?
Correct answer: D
"How much greater" means subtract: 18 − 4 = 14 kg. 22 kg is the total mass of both animals.
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Question 9
Which unit is the best choice for measuring the mass of an elephant?
Correct answer: C
An elephant is very heavy, so kilograms is the best unit. Grams are for light objects, liters measure liquid volume, and inches measure length.
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Question 10
Ana fills a cooler using a 2-liter pitcher. She pours 5 full pitchers into the cooler, and then the cooler is full. How many liters does the cooler hold?
Correct answer: B
5 pitchers of 2 liters is 5 × 2 = 10 liters. 7 liters comes from adding 5 + 2.
Questions you leave blank are not counted as wrong.
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