Questions on Mass and Weight
Multiple-Choice Questions – Mass and Weight
1. What is the unit of mass in the metric system?
A) Newton
B) Gram
C) Pound
D) Liter
E) Meter
2. What is the SI base unit of mass?
A) Pound
B) Gram
C) Newton
D) Kilogram
E) Ounce
3. Which of the following measures weight, not mass?
A) Balance scale
B) Beam balance
C) Spring scale
D) Triple beam balance
E) Laboratory balance
4. Which statement is true about mass?
A) It changes depending on gravity.
B) It is measured in newtons.
C) It is a force.
D) It stays constant regardless of location.
E) It can be zero in space.
5. What is the relationship between mass and weight?
A) Weight = Mass × Speed
B) Weight = Mass ÷ Volume
C) Weight = Mass × Gravity
D) Weight = Mass + Volume
E) Weight = Mass – Gravity
6. If an object has a mass of 10 kg, what is its weight on Earth?
(Use g = 9.8 m/s²)
A) 10 N
B) 98 N
C) 100 N
D) 9.8 N
E) 980 N
7. Which tool is most appropriate for measuring mass in a lab?
A) Thermometer
B) Stopwatch
C) Triple beam balance
D) Spring scale
E) Barometer
8. Which statement about weight is correct?
A) Weight is the same everywhere.
B) Weight is a measure of the amount of matter.
C) Weight is a force caused by gravity.
D) Weight is measured in grams.
E) Weight never changes.
9. On the Moon, a person weighs less than on Earth because:
A) There is no air on the Moon.
B) The Moon's temperature is lower.
C) Gravity is weaker on the Moon.
D) The person has less mass.
E) The Moon spins faster.
10. A student's mass is 50 kg. What is their approximate weight on Earth?
A) 500 N
B) 490 N
C) 50 N
D) 5,000 N
E) 4.9 N
11. What happens to an object’s mass when it moves to space?
A) It becomes zero.
B) It decreases by half.
C) It increases.
D) It stays the same.
E) It turns into weight.
12. Which is a correct unit for weight?
A) Kilogram
B) Pound
C) Newton
D) Gram
E) Centimeter
13. What instrument measures weight using gravity?
A) Electronic balance
B) Spring scale
C) Stopwatch
D) Ruler
E) Thermometer
14. The mass of an object is 12 kg. What is the weight on Earth?
A) 120 N
B) 118 N
C) 1.2 N
D) 98 N
E) 124 N
15. The greater the gravitational pull, the greater the:
A) Mass
B) Weight
C) Density
D) Volume
E) Inertia
16. Which of the following quantities can change with location?
A) Mass only
B) Volume only
C) Weight only
D) Both mass and weight
E) Neither mass nor weight
17. Mass is a measure of:
A) How heavy an object feels
B) How much matter an object contains
C) The gravitational pull on an object
D) The size of an object
E) The volume of an object
18. What is the weight of a 2 kg object on the Moon where gravity is 1.6 m/s²?
A) 3.2 N
B) 12.8 N
C) 19.6 N
D) 20 N
E) 1.2 N
19. An astronaut’s mass on Earth is 80 kg. What is their mass on the Moon?
A) 80 kg
B) 8 kg
C) 13.3 kg
D) 0 kg
E) 48 kg
20. Why is mass preferred over weight in scientific measurements?
A) Mass is easier to measure.
B) Weight is not a real quantity.
C) Mass depends on gravity.
D) Mass is constant and not affected by gravity.
E) Weight can only be measured on Earth.
Answer Key with Explanations
1. B) Gram – Basic unit of mass in metric system.
2. D) Kilogram – SI base unit of mass.
3. C) Spring scale – Measures weight using tension from gravity.
4. D) It stays constant regardless of location – Mass doesn't change with gravity.
5. C) Weight = Mass × Gravity – Weight is a force due to gravity.
6. B) 98 N – 10 × 9.8 = 98 Newtons.
7. C) Triple beam balance – Accurate tool for measuring mass.
8. C) Weight is a force caused by gravity – It depends on local gravity.
9. C) Gravity is weaker on the Moon – Hence lower weight.
10. B) 490 N – 50 kg × 9.8 m/s² = 490 N.
11. D) It stays the same – Mass is constant.
12. C) Newton – SI unit for weight (a force).
13. B) Spring scale – Measures force of gravity (weight).
14. B) 118 N – 12 kg × 9.8 m/s² = 117.6 N ≈ 118 N.
15. B) Weight – More gravity = more weight.
16. C) Weight only – Mass remains constant; weight varies with gravity.
17. B) How much matter an object contains – Mass is amount of matter.
18. A) 3.2 N – 2 × 1.6 = 3.2 Newtons on the Moon.
19. A) 80 kg – Mass doesn’t change with location.
20. D) Mass is constant and not affected by gravity – Makes it reliable.
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