Chapter Exam

Chapter-7 Temperature and its Measurement — Online MCQ Test

Q: What is the instrument used to measure temperature?

Answer: A. Thermometer — A thermometer is a device specifically designed to measure temperature by using the expansion and contraction of liquids or gases.

Q: At what temperature does water freeze on the Celsius scale?

Answer: A. 0°C — Water freezes at 0°C on the Celsius temperature scale, which is a fundamental reference point for the Celsius scale.

Q: At what temperature does water boil on the Celsius scale?

Answer: C. 100°C — Water boils at 100°C on the Celsius scale, which is the upper reference point used to define the Celsius temperature scale.

Q: What is temperature?

Answer: B. A measure of how hot or cold an object is — Temperature is a measure of the hotness or coldness of an object, indicating the average kinetic energy of its molecules.

SCIENCE · Grade 6 · CBSE(NCERT)

Practice Chapter-7 Temperature and its Measurement with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 6 SCIENCE. This chapter covers: thermometer - Celsius - heat energy - temperature. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-7 Temperature and its Measurement — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 6 SCIENCE — Chapter-7 Temperature and its Measurement, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the instrument used to measure temperature?

A. Thermometer ✓
B. Barometer
C. Hygrometer
D. Anemometer

Answer: A. Thermometer
A thermometer is a device specifically designed to measure temperature by using the expansion and contraction of liquids or gases.

At what temperature does water freeze on the Celsius scale?

A. 0°C ✓
B. 32°C
C. 100°C
D. -10°C

Answer: A. 0°C
Water freezes at 0°C on the Celsius temperature scale, which is a fundamental reference point for the Celsius scale.

At what temperature does water boil on the Celsius scale?

A. 0°C
B. 50°C
C. 100°C ✓
D. 212°C

Answer: C. 100°C
Water boils at 100°C on the Celsius scale, which is the upper reference point used to define the Celsius temperature scale.

What is temperature?

A. The amount of heat energy in an object
B. A measure of how hot or cold an object is ✓
C. The total energy of all molecules in a substance
D. The speed of light passing through a substance

Answer: B. A measure of how hot or cold an object is
Temperature is a measure of the hotness or coldness of an object, indicating the average kinetic energy of its molecules.

Why does a thermometer have a narrow tube?

A. To reduce the amount of liquid needed
B. To allow the liquid to expand and contract more noticeably for small changes in temperature ✓
C. To make it look elegant
D. To prevent liquid from spilling

Answer: B. To allow the liquid to expand and contract more noticeably for small changes in temperature
The narrow tube (capillary) of a thermometer amplifies the expansion and contraction of the liquid, making small temperature changes clearly visible and measurable.

If a patient has a body temperature of 39°C, which statement is correct?

A. The patient has a normal temperature
B. The patient has a fever because the temperature is above 37°C ✓
C. The patient is experiencing hypothermia
D. The patient's temperature is at the boiling point of water

Answer: B. The patient has a fever because the temperature is above 37°C
A temperature of 39°C is above the normal body temperature of 37°C, indicating the patient has a fever.

Why is mercury preferred over water in thermometers?

A. Because water is cheaper
B. Because mercury expands uniformly with temperature and does not freeze easily at low temperatures ✓
C. Because mercury is less dense than water
D. Because mercury is more visible than water

Answer: B. Because mercury expands uniformly with temperature and does not freeze easily at low temperatures
Mercury is ideal for thermometers because it expands uniformly with temperature changes, has a wide liquid range, and does not freeze at typical environmental temperatures.

A student measures the temperature of three different substances: ice water at 0°C, room temperature water at 25°C, and hot water at 60°C. Which statement correctly compares the kinetic energy of molecules?

A. All three have the same kinetic energy
B. Hot water has the highest average kinetic energy, followed by room temperature water, then ice water ✓
C. Ice water has the highest kinetic energy because it is denser
D. The kinetic energy depends only on the volume of water, not temperature

Answer: B. Hot water has the highest average kinetic energy, followed by room temperature water, then ice water
Temperature directly correlates with the average kinetic energy of molecules; higher temperature means greater molecular motion and kinetic energy.

Which statement best describes the relationship between heat and temperature in the context of the first law of thermodynamics?

A. Heat and temperature are identical concepts
B. Heat is the transfer of thermal energy, and temperature measures the result of that transfer in terms of molecular kinetic energy ✓
C. Temperature causes heat to flow from cold to hot objects
D. Heat energy can only be measured in Celsius

Answer: B. Heat is the transfer of thermal energy, and temperature measures the result of that transfer in terms of molecular kinetic energy
Heat represents energy in transit due to temperature differences, while temperature is the measure of average kinetic energy; understanding their distinction is fundamental to thermodynamics.

A student heats 100 mL of water from 20°C to 40°C and also heats 100 mL of oil from 20°C to 40°C. Which conclusion is MOST accurate?

A. Both liquids received the same amount of heat energy from the heat source
B. Water required more heat energy than oil because water has a higher specific heat capacity ✓
C. Oil required more heat energy because it has a higher boiling point
D. Both liquids have identical thermal properties after reaching 40°C

Answer: B. Water required more heat energy than oil because water has a higher specific heat capacity
Water has a higher specific heat capacity than oil, meaning it requires more heat energy to achieve the same temperature change, even though both reach the same final temperature.

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