Heat Class 7 MCQs Best 100 MCQs

Heat Class 7 MCQs Best 100 MCQs to score full marks in your exams. Topics covered – Hot and Cold, Measuring Temperature, Transfer of Heat, Kinds of Clothes We Wear in Summer and Winter, Additional Questions, Important Definitions.

1.Hot and Cold – Heat Class 7 MCQs Best 100 MCQs

Question 1: Which of the following is NOT a reliable way to determine if an object is hot or cold?

A. Touching the object

B. Using a thermometer

C. Observing the object’s color

D. Relying on personal perception

Question 2: Why can’t we solely rely on our sense of touch to differentiate between hot and cold objects?

A. Our sense of touch is always accurate.

B. Touch can be influenced by the temperature of our own hands.

C. Touch can only detect extreme temperatures.

D. We can always rely on touch to tell the difference.

Question 3: What is the most accurate way to measure how hot or cold an object is?

A. Estimating based on its appearance

B. Using a thermometer

C. Touching it with your hand

D. Comparing it to another object

Question 4: Which of the following is the best definition of temperature?

A. The amount of heat an object contains

B. A measure of the average kinetic energy of the particles in a substance

C. The feeling of hotness or coldness

D. The ability of an object to transfer heat

Question 5: What instrument is used to measure temperature?

A. Barometer

B. Hygrometer

C. Thermometer

D. Anemometer

Heat Class 7 MCQs Best 100 MCQs

2.Measuring Temperature – Heat Class 7 MCQs Best 100 MCQs

Question 6: What is the primary purpose of a clinical thermometer?

A. To measure the temperature of chemicals in a laboratory

B. To measure the temperature of the human body

C. To measure the temperature of the environment

D. To measure the temperature of food

Question 7: Which temperature scale is commonly used in clinical thermometers?

A. Fahrenheit

B. Celsius

C. Kelvin

D. Rankine

Question 8: What is the normal human body temperature on the Celsius scale?

A. 35°C

B. 37°C

C. 40°C

D. 42°C

Question 9: Which part of a clinical thermometer contains mercury?

A. The stem

B. The bulb

C. The scale

D. The kink

Question 10: Why should you avoid holding a clinical thermometer by the bulb while reading it?

A. It can affect the accuracy of the reading

B. The bulb is fragile and can break easily

C. It’s difficult to see the mercury level when holding the bulb

D. It’s uncomfortable to hold the bulb

Heat Class 7 MCQs Best 100 MCQs

Question 11: What is the typical temperature range of a laboratory thermometer?

A. 0°C to 100°C

B. -10°C to 110°C

C. 35°C to 42°C

D. -20°C to 50°C

Question 12: Which of the following thermometers is used to measure the maximum and minimum temperatures of the previous day?

A. Clinical thermometer

B. Laboratory thermometer

C. Maximum-minimum thermometer

D. Digital thermometer

Question 13: Why should you not use a clinical thermometer to measure the temperature of boiling water?

A. It’s not designed for high temperatures and could break

B. It’s not accurate enough for measuring boiling water

C. It’s difficult to immerse the clinical thermometer in boiling water

D. It’s unnecessary to use a clinical thermometer for boiling water

Question 14: What is the purpose of the kink in a clinical thermometer?

A. To make it easier to read

B. To prevent the mercury level from falling on its own

C. To make it more durable

D. To indicate the normal body temperature

Question 15: Which of the following is a precaution to take when using a laboratory thermometer?

A. Hold the thermometer by the bulb

B. Keep the thermometer tilted

C. Ensure the bulb is fully immersed in the substance being measured

D. Use the thermometer to measure your body temperature

Heat Class 7 MCQs Best 100 MCQs

Question 16: What is the main difference between a clinical and a laboratory thermometer?

A. The temperature range they can measure

B. The type of liquid used inside

C. The way they are read

D. Their size and shape

Question 17: Which thermometer would you use to measure the temperature of a chemical reaction in a test tube?

A. Clinical thermometer

B. Laboratory thermometer

C. Maximum-minimum thermometer

D. Digital thermometer

Question 18: Why is mercury being phased out in thermometers?

A. It’s too expensive

B. It’s difficult to obtain

C. It’s a toxic substance

D. It’s not accurate enough

Question 19: What is the advantage of using a digital thermometer over a mercury thermometer?

A. Digital thermometers are more accurate

B. Digital thermometers are easier to read

C. Digital thermometers are safer because they don’t contain mercury

D. All of the above

Question 20: Which of the following is NOT a precaution to take when using a clinical thermometer?

A. Wash the thermometer before and after use

B. Ensure the mercury level is below 35°C before use

C. Hold the thermometer by the bulb while reading it

D. Handle the thermometer with care to avoid breakage

Heat Class 7 MCQs Best 100 MCQs

3.Transfer of Heat – Heat Class 7 MCQs Best 100 MCQs

Question 21: Which process transfers heat from one end of a metal rod to the other when one end is heated?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Question 22: In which state of matter does conduction occur most efficiently?

A. Solids

B. Liquids

C. Gases

D. Plasma

Question 23: Which of the following materials is a good conductor of heat?

A. Wood

B. Plastic

C. Air

D. Copper

Question 24: What is the process by which heat is transferred through the movement of fluids (liquids or gases)?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Question 25: How does heat transfer occur in a pot of water being heated on a stove?

A. Primarily through conduction

B. Primarily through convection

C. Primarily through radiation

D. Equally through conduction, convection, and radiation

Heat Class 7 MCQs Best 100 MCQs

Question 26: Which of the following is an example of heat transfer by convection?

A. Feeling the warmth of a campfire

B. Burning your hand on a hot stove

C. The sun warming the Earth

D. A hot air balloon rising

Question 27: How does heat from the sun reach the Earth?

A. Conduction

B. Convection

C. Radiation

D. All of the above

Question 28: Which of the following does NOT require a medium for heat transfer?

A. Conduction

B. Convection

C. Radiation

D. All of the above require a medium

Question 29: Why do we feel warm when sitting in front of a room heater?

A. Conduction from the heater to our body

B. Convection currents in the air

C. Radiation from the heater

D. All of the above

Question 30: What happens to the heat that falls on an object?

A. It is completely absorbed.

B. It is completely reflected.

C. It is partly reflected, partly absorbed, and partly transmitted

D. It disappears.

Heat Class 7 MCQs Best 100 MCQs

Question 31: Why does the temperature of an object increase when exposed to heat?

A. Due to the reflected part of the heat

B. Due to the transmitted part of the heat

C. Due to the absorbed part of the heat

D. Due to all parts of the heat

Question 32: Which of the following is the best explanation for why we use an umbrella when going out in the sun?

A. To block the sun’s radiation and prevent heat absorption

B. To create shade and reduce convection

C. To prevent conduction of heat from the air

D. To look fashionable

Question 33: What is the primary reason a metal spoon left in a cup of hot tea becomes hot?

A. Convection

B. Conduction

C. Radiation

D. Insulation

Question 34: Which of the following is an example of an insulator?

A. Iron

B. Copper

C. Aluminum

D. Wood

Question 35: Why does hot air rise and cold air sink?

A. Hot air is less dense than cold air

B. Hot air is more dense than cold air

C. Hot air has more energy than cold air

D. Cold air has more energy than hot air

Heat Class 7 MCQs Best 100 MCQs

Question 36: How is heat transferred from the sun to the earth?

A. Conduction

B. Convection

C. Radiation

D. Both conduction and convection

Question 37: Which of the following statements about heat transfer is true?

A. Heat always flows from a colder object to a hotter object

B. Heat only flows through solids

C. Heat transfer can occur without a medium

D. Convection is the fastest mode of heat transfer

Question 38: Which of the following is a poor conductor of heat?

A. Metal

B. Water

C. Air

D. Both water and air

Question 39: What is the process of heat transfer in which heat energy is carried by the movement of particles within a fluid?

A. Conduction

B. Convection

C. Radiation

D. Thermal expansion

Question 40: Which of the following is an example of heat transfer by radiation?

A. A metal spoon getting hot in a cup of coffee

B. Warm air rising from a heater

C. Feeling the warmth of the sun on your skin

D. Cooking food in a pan on a stove

4.Kinds of Clothes We Wear in Summer and Winter – Heat Class 7 MCQs Best 100 MCQs

Question 41: Why are light-colored clothes preferred in summer?

A. They absorb more heat.

B. They reflect more heat.

C. They conduct heat away from the body.

D. They insulate the body.

Question 42: Which color absorbs the most heat?

A. White

B. Black

C. Yellow

D. Blue

Question 43: Why are dark-colored clothes preferred in winter?

A. They reflect more heat.

B. They absorb more heat.

C. They conduct heat away from the body.

D. They allow air to circulate easily.

Question 44: How do woolen clothes keep us warm in winter?

A. They are good conductors of heat

B. They trap air, which acts as an insulator

C. They reflect body heat back to the body

D. They generate heat

Question 45: Which property of air makes it a good insulator?

A. High density

B. Low density

C. High conductivity

D. Low conductivity

Heat Class 7 MCQs – Best 100 MCQs

Question 46: Why is it warmer to wear multiple layers of thin clothing than one thick layer in winter?

A. Multiple layers trap more air, providing better insulation

B. Multiple layers are more fashionable

C. Multiple layers allow for better air circulation

D. Multiple layers are lighter to wear

Question 47: Which of the following statements is true about the role of color in heat absorption?

A. Light colors absorb more heat than dark colors

B. Dark colors absorb more heat than light colors

C. All colors absorb the same amount of heat

D. Color has no effect on heat absorption

Question 48: Why do people in hot climates often paint the exterior of their houses white?

A. To make them look more attractive

B. To reflect more sunlight and keep the houses cooler

C. To absorb more sunlight and keep the houses warmer

D. To protect the walls from weathering

Question 49: Which of the following is NOT a reason why woolen clothes are suitable for winter?

A. Wool is a poor conductor of heat

B. Wool traps air, providing insulation

C. Wool is lightweight and breathable

D. Wool fibers create a barrier against heat loss

Question 50: How does the color of clothing affect comfort in different seasons?

A. Light colors are more comfortable in winter because they absorb more heat

B. Dark colors are more comfortable in summer because they reflect more heat

C. Light colors are more comfortable in summer because they reflect more heat

D. Color has no effect on comfort in different seasons

Heat Class 7 MCQs – Best 100 MCQs

Question 51: Which of the following explains why a black car gets hotter than a white car on a sunny day?

A. Black reflects more sunlight than white

B. White reflects more sunlight than black

C. Black and white absorb the same amount of sunlight

D. The color of the car has no effect on its temperature

Question 52: In cold climates, why are houses often built with thick walls and insulation?

A. To increase heat loss

B. To decrease heat loss

C. To allow more air circulation

D. To make the houses look bigger

Question 53: Which of the following materials would be the best insulator for a house?

A. Metal

B. Glass

C. Fiberglass

D. Concrete

Question 54: How does trapped air help in keeping a house warm in winter?

A. It conducts heat away from the house

B. It convects heat around the house

C. It radiates heat into the house

D. It prevents heat transfer by convection

Question 55: Which of the following is a disadvantage of using mercury in thermometers?

A. It’s expensive

B. It’s difficult to obtain

C. It’s toxic

D. It’s inaccurate

Heat Class 7 MCQs – Best 100 MCQs

Question 56: What is the main advantage of using hollow bricks in building construction?

A. They are cheaper than regular bricks

B. They are easier to install

C. They trap air, providing insulation

D. They are more aesthetically pleasing

Question 57: Which of the following is NOT a way to improve the insulation of a house?

A. Installing double-glazed windows

B. Adding insulation to the attic

C. Sealing gaps and cracks around doors and windows

D. Painting the exterior walls black

Question 58: Why is it important to insulate buildings?

A. To reduce energy consumption for heating and cooling

B. To improve indoor comfort

C. To reduce greenhouse gas emissions

D. All of the above

Question 59: Which of the following statements about the Celsius scale is true?

A. It was invented by Anders Celsius in 1742

B. It originally had the boiling point of water at 0°C and the freezing point at 100°C

C. It is the most widely used temperature scale in the world

D. All of the above

Question 60: Who invented the Celsius scale?

A. Gabriel Fahrenheit

B. William Thomson (Lord Kelvin)

C. Anders Celsius

D. Daniel Gabriel Fahrenheit

Heat Class 7 MCQs – Best 100 MCQs

5.Extra Questions – Heat Class 7 MCQs – Best 100 MCQs

Question 61: How do trapped air layers contribute to building insulation?

A. They increase heat transfer by conduction

B. They facilitate heat transfer by convection

C. They reduce heat transfer by acting as an insulator

D. They have no effect on heat transfer

Question 62: What is the main concern associated with the use of mercury in thermometers?

A. It’s expensive

B. It’s difficult to obtain

C. It’s toxic

D. It’s inaccurate

Question 63: Which of the following is an alternative to mercury thermometers?

A. Alcohol thermometers

B. Digital thermometers

C. Infrared thermometers

D. All of the above

Question 64: Why were mercury thermometers once widely used?

A. They are highly accurate

B. They are inexpensive

C. They are easy to read

D. All of the above

Question 65: What is the primary reason for phasing out mercury thermometers?

A. They are too expensive

B. They are difficult to obtain

C. They are toxic

D. They are inaccurate

Heat Class 7 MCQs – Best 100 MCQs

Question 66: Which of the following is NOT a potential health effect of mercury exposure?

A. Neurological damage

B. Kidney damage

C. Respiratory problems

D. Improved vision

Question 67: How can you safely dispose of a broken mercury thermometer?

A. Throw it in the trash

B. Flush it down the toilet

C. Contact your local waste disposal authority for proper disposal instructions

D. Bury it in your backyard

Question 68: What was the original scale of the Celsius thermometer?

A. 0°C for freezing point and 100°C for boiling point

B. 0°C for boiling point and 100°C for freezing point

C. 32°F for freezing point and 212°F for boiling point

D. -273°C for absolute zero and 0°C for freezing point

Question 69: In what year was the Celsius scale invented?

A. 1642

B. 1742

C. 1842

D. 1942

Question 70: Why is the Celsius scale widely used today?

A. It’s easy to understand and use

B. It’s based on the properties of water

C. It’s the standard scale for scientific measurements

D. All of the above

Heat Class 7 MCQs – Best 100 MCQs

6.Important Definitions – Heat Class 7 MCQs – Best 100 MCQs

Question 71: What is the definition of heat?

A. The degree of hotness or coldness of an object

B. A form of energy that flows from a hotter object to a colder object

C. The absence of cold

D. The transfer of temperature

Question 72: What is the definition of temperature?

A. The amount of heat an object contains

B. A measure of the average kinetic energy of the particles in a substance

C. The feeling of hotness or coldness

D. The ability of an object to transfer heat

Question 73: What is the definition of conduction?

A. The transfer of heat through the movement of fluids

B. The transfer of heat through direct contact

C. The transfer of heat through electromagnetic waves

D. The prevention of heat transfer

Question 74: What is the definition of convection?

A. The transfer of heat through the movement of fluids

B. The transfer of heat through direct contact

C. The transfer of heat through electromagnetic waves

D. The prevention of heat transfer

Question 75: What is the definition of radiation?

A. The transfer of heat through the movement of fluids

B. The transfer of heat through direct contact

C. The transfer of heat through electromagnetic waves

D. The prevention of heat transfer

Heat Class 7 MCQs – Best 100 MCQs

Question 76: What is a conductor?

A. A material that allows heat to pass through it easily

B. A material that prevents heat from passing through it

C. A material that absorbs heat

D. A material that reflects heat

Question 77: What is an insulator?

A. A material that allows heat to pass through it easily

B. A material that prevents heat from passing through it

C. A material that absorbs heat

D. A material that reflects heat

Question 78: What is the Celsius scale?

A. A temperature scale where 0°C is the freezing point of water and 100°C is the boiling point of water

B. A temperature scale where 32°F is the freezing point of water and 212°F is the boiling point of water

C. A temperature scale where 0K is absolute zero

D. A temperature scale used only in laboratories

Question 79: What is a clinical thermometer?

A. A thermometer used to measure the temperature of the human body

B. A thermometer used to measure the temperature of chemicals in a laboratory

C. A thermometer used to measure the temperature of the environment

D. A thermometer used to measure the temperature of food

Question 80: What is a laboratory thermometer?

A. A thermometer used to measure the temperature of the human body

B. A thermometer used to measure a wide range of temperatures in scientific settings

C. A thermometer used to measure the temperature of the environment

D. A thermometer used to measure the temperature of food

Heat Class 7 MCQs – Best 100 MCQs

Question 81: What is the sea breeze?

A. A cool breeze that blows from the land towards the sea during the day

B. A cool breeze that blows from the sea towards the land during the day

C. A warm breeze that blows from the land towards the sea at night

D. A warm breeze that blows from the sea towards the land at night

Question 82: What is the land breeze?

A. A cool breeze that blows from the land towards the sea during the day

B. A cool breeze that blows from the sea towards the land during the day

C. A cool breeze that blows from the land towards the sea at night

D. A warm breeze that blows from the sea towards the land at night

Question 83: What is the kink in a clinical thermometer used for?

A. To make it easier to read the temperature

B. To prevent the mercury from flowing back into the bulb

C. To increase the accuracy of the thermometer

D. To make the thermometer more durable

Question 84: Which of the following is NOT a way heat can be transferred?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Question 85: What is the transfer of heat through direct contact called?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Heat Class 7 MCQs – Best 100 MCQs

Question 86: What is the transfer of heat through the movement of fluids called?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Question 87: What is the transfer of heat through electromagnetic waves called?

A. Conduction

B. Convection

C. Radiation

D. Insulation

Question 88: Which of the following is an example of a good conductor of heat?

A. Wood

B. Plastic

C. Air

D. Metal

Question 89: Which of the following is an example of a good insulator of heat?

A. Metal

B. Water

C. Air

D. Copper

Question 90: Why do we wear light-colored clothes in summer?

A. They absorb more heat.

B. They reflect more heat.

C. They are more fashionable.

D. They are cheaper.

Heat Class 7 MCQs – Best 100 MCQs

Question 91: Why do we wear dark-colored clothes in winter?

A. They absorb more heat.

B. They reflect more heat.

C. They are more fashionable.

D. They are cheaper

Question 92: How do woolen clothes keep us warm in winter?

A. They are good conductors of heat.

B. They trap air, which is a good insulator.

C. They reflect heat back to our bodies.

D. They generate heat.

Question 93: What is the average normal human body temperature?

A. 35°C

B. 37°C

C. 39°C

D. 42°C

Question 94: Which type of thermometer has a kink in it?

A. Clinical thermometer

B. Laboratory thermometer

C. Maximum-minimum thermometer

D. Digital thermometer

Heat Class 7 MCQs – Best 100 MCQs

Question 95: What is the process of heat transfer that doesn’t require a medium?

A. Conduction

B. Convection

C. Radiation

D. All of the above

Question 96: Which of the following is NOT a reason why we feel warmer wearing multiple layers of clothing in winter compared to a single thick layer?

A. Multiple layers trap more air, which acts as an insulator

B. Air trapped between the layers reduces heat loss by convection

C. Multiple layers are heavier and therefore warmer

D. The combination of fabric and air layers provides better insulation

Question 97: What is the primary reason for using hollow bricks in building construction?

A. They are cheaper

B. They are lighter

C. They provide better insulation

D. They are easier to install

Question 98: Which of the following is a concern associated with the use of mercury in thermometers?

A. It is expensive

B. It is difficult to obtain

C. It is toxic

D. It is inaccurate

Question 99: Who invented the Celsius scale?

A. Anders Celsius

B. Gabriel Fahrenheit

C. Lord Kelvin

D. Galileo Galilei

Question 100: What are the three ways in which heat can be transferred?

A. Conduction, convection, and radiation

B. Conduction, convection, and insulation

C. Convection, radiation, and evaporation

D. Conduction, radiation, and condensation

Read Also: Our Changing Earth Class 7 MCQs – Best 100 Geography MCQs

7.Heat class 7 important questions and answers