Temperature and Heat: Interactive Quizzes and Practice Questions

Question 1

What is the SI unit of temperature, often used in scientific contexts?

Accepted Answer

Kelvin

Answer

Degree Celsius

Answer

Degree Fahrenheit

Answer

Rankine

Question 2

When a metal spoon and a wooden spoon are placed in the same cup of hot coffee, the metal spoon feels hotter. Why is this?

Accepted Answer

Metals conduct heat more efficiently than wood.

Answer

Metals possess a higher specific heat capacity than wood.

Answer

Metals possess a lower specific heat capacity than wood.

Answer

Wood conducts heat more efficiently than metal.

Question 3

Which of the following materials has the highest insulating ability?

Accepted Answer

Polystyrene

Answer

Copper

Answer

Aluminium

Answer

Water

Question 4

In the United Kingdom, which temperature scale is widely used?

Accepted Answer

Celsius scale

Answer

Fahrenheit scale

Answer

Kelvin scale

Answer

Rankine scale

Question 5

When heat is transferred through direct contact between objects, this process is known as:

Accepted Answer

Conduction

Answer

Electromagnetic radiation

Answer

Convection

Answer

Specific heat capacity

Question 6

The specific heat capacity of a substance is defined as:

Accepted Answer

The amount of heat needed to raise the temperature of 1 gram of the substance by 1 degree Celsius

Answer

The amount of heat released when 1 gram of the substance cools down by 1 degree Celsius

Answer

The amount of heat needed to change the phase of 1 gram of the substance

Answer

The amount of heat transferred when 1 gram of the substance is mixed with 1 gram of water

Question 7

A refrigerator operates by:

Accepted Answer

Transferring heat from the interior to the exterior

Answer

Transferring heat from the exterior to the interior

Answer

Preventing heat from entering the interior

Answer

Generating a cold environment within

Question 8

Which of these factors does NOT influence the efficiency of a heat engine?

Accepted Answer

Gravitational acceleration

Answer

Temperature difference between hot and cold reservoirs

Answer

Nature of the working fluid

Answer

Design of the engine

Question 9

Which of the following temperature scales is an absolute scale, meaning it has a true zero point where molecular motion ceases?

Accepted Answer

Kelvin

Answer

Celsius

Answer

Fahrenheit

Answer

Rankine

Question 10

A substance with a higher specific heat capacity (e.g., 4200 J/kg K) requires what compared to a substance with a lower specific heat capacity to raise its temperature by the same amount?

Accepted Answer

More energy

Answer

Less energy

Answer

The same amount of energy

Answer

No energy

Question 11

Which of the following processes involves the transfer of thermal energy solely through electromagnetic waves?

Accepted Answer

Radiation

Answer

Convection

Answer

Conduction

Answer

Evaporation

Question 12

Which of the following is not a valid unit of energy?

Accepted Answer

Kelvin

Answer

Joule

Answer

Calorie

Answer

British Thermal Unit

Question 13

The process of releasing heat from a substance to its surroundings is described as:

Accepted Answer

Exothermic

Answer

Endothermic

Answer

Adiabatic

Answer

Isenthalpic

Question 14

An example of convection in the real world is:

Accepted Answer

Heat rising from a radiator

Answer

Boiling water

Answer

Melting ice

Answer

Cooking with a microwave

Question 15

The form of energy needed to change the phase of a substance (e.g., from solid to liquid) without altering its temperature is known as:

Accepted Answer

Latent heat

Answer

Sensible heat

Answer

Specific heat

Answer

Thermal energy

Question 16

Which material is a good conductor of heat?

Accepted Answer

Copper

Answer

Wood

Answer

Plastic

Answer

Styrofoam

Question 17

Which material is the best conductor of heat?

Accepted Answer

Copper

Answer

Wood

Answer

Glass

Answer

Rubber

Question 18

Which temperature scale has its zero point at absolute zero, where all molecular motion ceases?

Accepted Answer

Kelvin

Answer

Fahrenheit

Answer

Celsius

Answer

Rankine

Question 19

A 100-gram piece of metal with a specific heat capacity of 0.5 J/g°C undergoes a temperature increase of 20°C. How much heat energy (in Joules) is required for this temperature change?

Accepted Answer

1000 J

Answer

1500 J

Answer

2000 J

Answer

500 J

Question 20

Which of the following mechanisms involves the transfer of heat energy through electromagnetic waves?

Accepted Answer

Radiation

Answer

Conduction

Answer

Convection

Answer

Evaporation

Question 21

The roof of a house is insulated to minimize heat loss during winter. Which mechanism of heat transfer does the insulation primarily reduce?

Accepted Answer

Conduction

Answer

Convection

Answer

Radiation

Answer

Evaporation

Question 22

In a closed system, heat energy can be transferred from one object to another through which processes?

Accepted Answer

conduction, convection, and radiation

Answer

conduction only

Answer

conduction and convection only

Answer

convection and radiation only

Question 23

The heat transfer process that involves the movement of a fluid is referred to as:

Accepted Answer

Convection

Answer

Conduction

Answer

Evaporation

Answer

Radiation

Question 24

Which material category is generally recognized for its high thermal conductivity?

Accepted Answer

Metal

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 25

A substance with a high specific heat capacity will:

Accepted Answer

absorb more heat energy to produce a given temperature change

Answer

absorb less heat energy to produce a given temperature change

Answer

have a higher temperature than a substance with a lower specific heat capacity

Question 26

Which of the following is the SI unit of heat energy?

Accepted Answer

Joule

Answer

Degree Celsius

Answer

Watt

Answer

Kelvin

Question 27

The process of heat transfer by the emission and absorption of electromagnetic waves is known as:

Accepted Answer

Radiation

Answer

Convection

Answer

Conduction