Class 7 Heat MCQs with Answers
CBSE Class 7 Science – Heat MCQs with Answers & Explanations
Class: 7
Subject: Science
Section: Heat
Topic: Class 7 Heat MCQs with Answers
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 Science examinations. Each answer includes an easy and concept-clearing explanation.
Subject: Science
Section: Heat
Topic: Class 7 Heat MCQs with Answers
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 Science examinations. Each answer includes an easy and concept-clearing explanation.
1. The reliable measure of hotness of an object is its:
Answer: B. Temperature
Temperature tells how hot or cold an object is. It is measured using a thermometer.
Temperature tells how hot or cold an object is. It is measured using a thermometer.
2. SI unit of temperature is:
Answer: C. Kelvin
Kelvin is the SI unit, though Celsius is commonly used in daily life.
Kelvin is the SI unit, though Celsius is commonly used in daily life.
3. The normal human body temperature is:
Answer: B
37°C (98.6°F) is the average healthy human body temperature.
37°C (98.6°F) is the average healthy human body temperature.
4. Device used to measure temperature:
Answer: B
Thermometers measure temperature using expansion of liquids like mercury.
Thermometers measure temperature using expansion of liquids like mercury.
5. Clinical thermometers measure temperature in:
Answer: B
This range suits human body temperature readings.
This range suits human body temperature readings.
6. Laboratory thermometer range is usually:
Answer: B
It measures temperatures beyond body range.
It measures temperatures beyond body range.
7. Heat flows from:
Answer: B
Heat naturally transfers from higher to lower temperature.
Heat naturally transfers from higher to lower temperature.
8. Materials that allow heat to pass are:
Answer: B
Metals are good conductors of heat.
Metals are good conductors of heat.
9. Wood is a:
Answer: B
Wood resists heat flow, so it’s used for handles.
Wood resists heat flow, so it’s used for handles.
10. Transfer of heat in liquids occurs by:
Answer: B
Heated liquid rises, cooler liquid sinks forming convection currents.
Heated liquid rises, cooler liquid sinks forming convection currents.
11. Heat transfer without medium is:
Answer: C
Sun’s heat reaches Earth by radiation.
Sun’s heat reaches Earth by radiation.
12. Black surfaces are:
Answer: B
Black absorbs maximum heat.
Black absorbs maximum heat.
13. Woollen clothes keep us warm because:
Answer: B
Air trapped in wool prevents heat loss.
Air trapped in wool prevents heat loss.
14. Sea breeze occurs during:
Answer: A
Land heats faster; cool air from sea moves in.
Land heats faster; cool air from sea moves in.
15. Land breeze occurs at:
Answer: B
Land cools faster; air moves toward sea.
Land cools faster; air moves toward sea.
16. Metals expand on:
Answer: B
Heating increases particle spacing causing expansion.
Heating increases particle spacing causing expansion.
17. Mercury is used in thermometers because:
Answer: B
Mercury expands evenly and is easy to see.
Mercury expands evenly and is easy to see.
18. Kink in clinical thermometer prevents:
Answer: B
It holds mercury level for reading.
It holds mercury level for reading.
19. Dark clothes are worn in winter because they:
Answer: B
They absorb more solar radiation.
They absorb more solar radiation.
20. Transfer of heat by direct contact is:
Answer: C
Heat passes particle to particle in solids.
Heat passes particle to particle in solids.