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Explore our comprehensive collection of MCQ on heat class 7 tailored specifically for students following the CBSE syllabus. This section features a detailed list of heat class 7 MCQ questions with answers, meticulously curated to align with the NCERT guidelines and the CBSE curriculum.
Chapter 4 of the Class 7 Science NCERT textbook get into the intriguing topic of heat, examining its properties, sources, and effects on different substances. These heat class 7 MCQ are designed to test students’ understanding of key concepts introduced in the chapter, providing a robust foundation for their science education.
By engaging with these multiple-choice questions, students can reinforce their knowledge of the chapter’s content, ensuring they are well-prepared for their exams and have a solid grasp of the fundamental principles discussed in their NCERT textbook.
Science Chapter 4 Heat Class 7 MCQ with Answers
Here are the list of 50 various chapter 4 heat class 7 MCQ questions. These questions cover various aspects discussed in the chapter, including the properties of heat, methods of heat transfer, and everyday applications of heat principles.
Class 7 Heat MCQs with Answers
Q.1: What is the normal body temperature in Celsius as mentioned in NCERT?
A) 35°C
B) 42°C
C) 37°C
D) 30°C
Answer: C
Q.2: Which material is a poor conductor of heat?
A) Aluminum
B) Copper
C) Wool
D) Iron
Answer: C
Q.3: What prevents the mercury level from falling in a clinical thermometer when removed from the mouth?
A) The bulb
B) The glass tube
C) The kink
D) The scale
Answer: C
Q.4: Heat transfer that does not require a medium is called?
A) Conduction
B) Convection
C) Radiation
D) Reflection
Answer: C
Q.5: What is the primary reason woollen clothes keep us warm?
A) They are made from animal fibres.
B) They are tightly woven.
C) They trap air.
D) They are thick.
Answer: C
Q.6: Which scale is used in India for measuring temperature as mentioned in the NCERT textbook?
A) Kelvin
B) Fahrenheit
C) Celsius
D) Rankine
Answer: C
Q.7: Which type of clothes do we prefer to wear in summer according to NCERT?
A) Dark-coloured
B) Thick
C) Light-coloured
D) Woolen
Answer: C
Q.8: What type of thermometer is used to measure body temperature?
A) Laboratory thermometer
B) Digital thermometer
C) Clinical thermometer
D) Weather thermometer
Answer: C
Q.9: According to NCERT, which type of breeze occurs at night at coastal areas?
A) Sea breeze
B) Land breeze
C) Solar breeze
D) Lunar breeze
Answer: B
Q.10: What happens to the water at the bottom of a flask when heated from below?
A) It cools down
B) It evaporates
C) It rises
D) It condenses
Answer: C
Q.11: Which part of the clinical thermometer contains mercury?
A) The tube
B) The scale
C) The bulb
D) The cap
Answer: C
Q.12: What phenomenon explains why hot water rises?
A) Conduction
B) Convection
C) Radiation
D) Expansion
Answer: B
Q.13: Why are light-coloured clothes more comfortable in the summer?
A) They absorb more heat
B) They do not absorb heat
C) They reflect most of the heat
D) They are generally looser
Answer: C
Q.14: What is the purpose of the kink in a clinical thermometer?
A) To prevent mercury from rising too high
B) To keep the thermometer straight
C) To prevent mercury from falling back
D) To increase the accuracy of the reading
Answer: C
Q.15: Why should a clinical thermometer not be used to measure high temperatures?
A) It can break easily
B) It does not have a high enough range
C) It is not accurate enough
D) It can melt
Answer: B
Q.16: What should you do if mercury from a thermometer is spilled?
A) Clean it with water
B) Leave it as it is
C) Collect it with a brush
D) Treat it as hazardous and follow proper disposal procedures
Answer: D
Q.17: Why are stainless steel pans often provided with copper bottoms?
A) To improve heat conduction
B) To make them look more attractive
C) To make them easier to clean
D) To increase their weight
Answer: A
Q.18: Why is convection not possible in solids?
A) Molecules are too far apart
B) Molecules cannot move freely
C) Solids are too dense
D) Heat does not affect solids
Answer: B
Q.19: What is radiation?
A) Movement of heat through a fluid
B) Direct transfer of heat through a material
C) Transfer of heat through electromagnetic waves
D) Generation of heat within an object
Answer: C
Q.20: What happens to the molecules of a substance when it is heated?
A) They come closer together
B) They stop moving
C) They move faster and spread apart
D) They change state from solid to liquid
Answer: C
Q.21: What property of dark-coloured clothes makes them suitable for winter?
A) They reflect sunlight
B) They absorb more heat
C) They are usually made from thicker material
D) They repel cold air
Answer: B
Q.22: Why do we use a clinical thermometer for measuring body temperature?
A) It is less expensive
B) It has a high range
C) It is designed for accurate readings of body temperature
D) It can also measure room temperature
Answer: C
Q.23: Why should the bulb of a thermometer not touch the sides of the container?
A) To prevent it from breaking
B) To ensure accurate measurement
C) To prevent heat transfer to the container
D) To avoid contamination
Answer: B
Q.24: What does it mean if two objects at different temperatures are brought into contact?
A) Heat will flow from the warmer to the cooler object
B) The cooler object will transfer heat to the warmer one
C) They will not exchange heat
D) Heat will flow equally between the two objects
Answer: A
Q.25: Why is mercury used in thermometers?
A) It is inexpensive
B) It has a high boiling point
C) It is visible and expands uniformly
D) It is a solid at room temperature
Answer: C
Q.26: What is a land breeze?
A) Air moving from the sea to the land
B) Warm air moving from the land to the sea
C) Cool air moving from the land to the sea at night
D) Hot air rising over the sea
Answer: C
Q.27: What does a sea breeze bring?
A) Warm air from the sea during the day
B) Cool air from the sea during the night
C) Hot air from the land
D) Moisture from the sea
Answer: A
Q.28: Why do people living in coastal areas experience sea breezes?
A) The sea absorbs heat more quickly than the land
B) The land heats up and cools down more quickly than the sea
C) The sea is always cooler than the land
D) The land is hotter during the night
Answer: B
Q.29: What causes convection currents in water?
A) Water heating up uniformly
B) Hot water rising and cold water sinking
C) All parts of the water heating up at the same rate
D) Cold water rising to the surface
Answer: B
Q.30: Which of the following is not a method of heat transfer?
A) Conduction
B) Convection
C) Compression
D) Radiation
Answer: C
Q.31: What is an insulator?
A) A material that allows heat to pass through easily
B) A material that does not allow heat to pass through easily
C) A device used to measure temperature
D) A type of thermometer
Answer: B
Q.32: What type of heat transfer is experienced when you feel the heat from a fire without touching it?
A) Conduction
B) Convection
C) Radiation
D) Reflection
Answer: C
Q.33: Which material is considered a good conductor of heat?
A) Plastic
B) Wood
C) Copper
D) Wool
Answer: C
Q.34: Why does hot air rise?
A) It is denser than cold air
B) It is less dense than cold air
C) It is attracted to colder regions
D) It contains more moisture
Answer: B
Q.35: What device is used to measure temperature?
A) Barometer
B) Thermometer
C) Calorimeter
D) Hygrometer
Answer: B
Q.36: Which phenomenon explains why it is cooler at the seaside during the day?
A) Radiation
B) Conduction
C) Sea breeze
D) Land breeze
Answer: C
Q.37: What is advised to wear in summer to keep cool according to the NCERT text?
A) Tight clothing
B) Dark coloured clothing
C) Light coloured clothing
D) Thermal wear
Answer: C
Q.38: What happens to the molecules in a substance when it cools down?
A) They move faster
B) They expand
C) They slow down and contract
D) They change from liquid to solid
Answer: C
Q.39: Why are buildings in hot climates often painted white?
A) To reflect heat
B) To absorb heat
C) To prevent UV radiation
D) To look aesthetically pleasing
Answer: A
Q.40: What kind of thermometer is used to measure very high temperatures that are not suitable for clinical thermometers?
A) Digital thermometer
B) Glass thermometer
C) Laboratory thermometer
D) Infrared thermometer
Answer: C
Q.41: Why is it recommended to wear several layers of clothing in winter?
A) It looks fashionable
B) Multiple layers trap air, which is a good insulator
C) It is lighter than wearing one thick layer
D) It allows one layer to absorb all the cold
Answer: B
Q.42: How does heat travel from the sun to the earth?
A) Conduction
B) Convection
C) Radiation
D) Contraction
Answer: C
Q.43: What should you do before reading a clinical thermometer?
A) Shake it down to ensure mercury is at a low level
B) Heat it up
C) Cool it down
D) Wipe it with a wet cloth
Answer: A
Q.44: Why are copper bottoms used on stainless steel pans?
A) Copper is heavier than steel
B) Copper is a better conductor of heat
C) Copper is cheaper than steel
D) Copper is easier to clean
Answer: B
Q.45: Which of the following is true about radiation?
A) It requires a physical medium
B) It can occur in a vacuum
C) It only occurs in liquids
D) It is the slowest method of heat transfer
Answer: B
Q.46: What effect does the color of clothing have in terms of heat absorption?
A) Color has no effect on heat absorption
B) Dark colors absorb more heat
C) Light colors absorb more heat
D) All colors absorb heat equally
Answer: B
Q.47: Why does mercury in a thermometer rise or fall?
A) Due to the container’s material
B) Due to the temperature of the environment
C) Due to pressure changes
D) Due to the color of the mercury
Answer: B
Q.48: What is the main function of the kink in a clinical thermometer?
A) To make it easier to handle
B) To prevent mercury from falling back too quickly
C) To increase the temperature range
D) To reduce the amount of mercury used
Answer: B
Q.49: Which of the following materials is a good insulator?
A) Metal
B) Glass
C) Plastic
D) Copper
Answer: C
Q.50: Why is convection not possible in solids?
A) Molecules are tightly packed and cannot move freely
B) Solids do not contain any heat
C) Heat in solids is always transferred by radiation
D) Molecules in solids do not interact with heat
Answer: A
CBSE Science Chapter 4 Heat Class 7 MCQ FAQs
What is heat?
Heat is a form of energy that is transferred between objects due to a temperature difference. It flows from a hotter object to a cooler one.
How is heat measured?
Heat is measured in joules (J) or calories. A thermometer is commonly used to measure temperature, indicating the heat content of an object.
What are the three methods of heat transfer?
The three methods of heat transfer are conduction, convection, and radiation. Each method transfers heat differently through materials or space.
What is conduction?
Conduction is the transfer of heat through direct contact between materials. It occurs mainly in solids, where particles are closely packed.
Can you give an example of convection?
An example of convection is boiling water. As water heats up, it rises, and cooler water moves down to take its place, creating a circulation.
How does radiation transfer heat?
Radiation transfers heat through electromagnetic waves. Unlike conduction and convection, it does not require a medium and can occur in a vacuum.
What is thermal expansion?
Thermal expansion is the increase in size or volume of an object when its temperature rises. Most materials expand when heated and contract when cooled.
What are conductors and insulators?
Conductors are materials that allow heat to flow easily (e.g., metals), while insulators are materials that resist heat flow (e.g., wood, plastic).
Why is heat important in our daily life?
Heat plays a vital role in daily activities, from cooking and heating homes to industrial processes and climate regulation.
How can we conserve heat?
We can conserve heat by using insulators, sealing windows and doors, and using energy-efficient appliances to minimize heat loss.
