Chapter-7 Temperature and its Measurement — Online MCQ Test
SCIENCE (CURIOSITY) · CLASS 6th · Karnataka State Board
Practice Chapter-7 Temperature and its Measurement with a free chapter-wise online MCQ test.
This chapter covers: thermometer - Celsius - heat energy - temperature.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-7 Temperature and its Measurement — Important Questions & Answers
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.
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.
Water freezes at 0°C on the Celsius temperature scale, which is a fundamental reference point for the Celsius scale.
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.
The narrow tube (capillary) of a thermometer amplifies the expansion and contraction of the liquid, making small temperature changes clearly visible and measurable.
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.
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.
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.
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.