Class 7 Science MCQ Heat

Question : In which process heat is transferred from hotter end to colder end is known as:

(a) conduction
(b) convection
(c) radiation
(d) none of these

Question : The process by which heat comes from sun to the earth is __________________________.

(a) Conduction
(b) Convection
(c) Radiation
(d) Vaporization

Question : In case of____________ the cool air moves from the land towards the sea __________________________.

(a) Land breeze
(b) sea breeze
(c) Ice breeze
(d) sand breeze

Question : Sunlight reaches the earth’s surface through

(a) convection
(b) radiation
(c) conduction
(d) radio waves

Question : Which of the following is a insulator

(a) Graphite
(b) Air
(c) Aluminium rod
(d) Copper rod

Question : During the night

(a) Sea water heats up
(b) Land heats up
(c) Land cools more quickly than the sea
(d) Sea cools quickly than the land

Question : What is the normal temperature of a healthy person?

(a) 37°C
(b) 37°F
(c) 37 K
(d) None of these

Question : The normal temperature of human body is:

(a) 47°C
(b) 36°C
(c) 37°C
(d) 39°C

Question : The materials which allow the heat to pass through them easily are called

(a) insulators
(b) conductors
(c) semiconductors
(d) poor conductors

Question : Which scale was used in clinical thermometer during earlier times?

(a) Celsius scale
(b) Fahrenheit scale
(c) Both (a) and (b)
(d) None of these

Question : Which currents are formed in all liquid on heating ?

(a) radiation current
(b) conduction current
(c) convection current
(d) none of these

Question : Name the device used for measuring Temperature. __________________________.

(a) Thermometer
(b) Ammeter
(c) Anemometer
(d) Ammeter

Question : What is the use of kink in a Thermometer? __________________________.

(a) It prevents mercury level from falling on its own
b, It raises the mercury level
(c) It makes the Thermometer look beautiful
(d) It acts as a joint to the glass tube that is used for mercury and the scale

Question : The process by which heat flows from the hotter end to colder end of an object is called ( )

(a) Conduction
b, Convection
(c) Radiation
(d) Vaporisation

Question : The unit of measurement of Temperature is __________________________.

(a) Meter
(b) Kilogram
(c) Degree Celsius
(d) Second

Question : The normal temperature of Human body is __________________________.

(a) 40 ˚C
(b) 37 ˚C
(c) 42 ˚C
(d) 35 ˚

Question : The maximum and minimum temperatures of a day are measured with a __________________________.

(a) Celsius Thermometer
(b) Fahrenheit Thermometer
c. Maximum-minimum
(c)thermometer
(d) kelvin Thermometer

Question : The liquid metal used in a Thermometer is __________________________.

(a) Mercury
b, Silver
(c) Gold
(d) Copper

Question : The process by which transfer of heat takes place by the actual movement of particles from one part of the body to another part is called __________________________.

(a) Conduction

c.b. Convection
(c) Radiation
(d) vaporization

Question : The transfer of heat which does not require any medium is called __________________________.

(a) Conduction
(b) Convection
(c) Radiation
(d) Vaporization

Question : Stainless steel pans are usually provided with copper bottom. The reason for this could be that:

(a) copper bottom makes the pan more durable
(b) such pans appear colourful
(c) copper is easier to clean than stainless steel
(d) copper is a better conductor of heat than the stainless steel

Question : Light coloured clothes are preferred during:

(a) winter
(b) summer
(c) rainy
(d) none of these

Question : One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of mixture will be:

(a) 80°C
(b) More than 50°C but less than 80°C
(c) 20°C
(d) Between 30°C and 50°C

Question : The flow of heat by conduction is generally observed in case of

(a) solids
(b) liquids
(c) gases
(d) All of these

Question : Name the device which is used to measure the hotness or coldness of an object.

(a) Picometer
(b) Barometer
(c) Manometer
(d) Thermometer

Question : The correct method of reading a clinical thermometer is:

(a) holding the thermometer by bulb
(b) before use the mercury level should be below 39°C
(c) don’t hold the thermometer by bulb
(d) none of these

Question : Which thermometer records the highest and lowest temperature during a period of time ?

(a) Clinical thermometer
(b) Laboratory thermometer
(c) Minimum and maximum thermometer
(d) None of these

Question : Temperature is a measure of the degree of the:

(a) hotness of an object
(b) dryness
(c) coldness of an object
(d) none of these

Question : The phenomenon involved in the formation of land and sea breeze is:

(a) conduction
(b) convection
(c) radiation
(d) all of these

Question : Which thermometer is used to measure temperature of different things and places ?

(a) Laboratory thermometer
(b) Clinical thermometer
(c) Minimum and maximum thermometer
(d) None of these

Question : The clinical thermometers presently in use in India are marked with a temperature scale. This scale corresponds to which of the following?

(a) Celsius
(b) Farenheit
(c) Both (a) and (b)
(d) None of these

Question : Which of the following substance is not a bad conductor of heat ?

(a) Rubber
(b) Aluminium
(c) Glass
(d) Plastic

Question : Sonu and Ria measured their body temperature Sonu found his to be 98.6°F and Ria recorded 37°C. Which of the following statement is true?

(a) Sonu has a higher body temperature than Ria.
(b) Sonu has a lower body temperature than Ria.
(c) Both have normal body temperature.
(d) Both are suffering from fever.

Question : What is the SI unit of temperature?

(a) Kelvin
(b) Celsius
(c) Fahrenheit
(d) None of these

Question : Which thermometer is used to measure temperature of different things and places ?

(a) Laboratory thermometer
(b) Clinical thermometer
(c) Minimum and maximum thermometer
(d) None of these

Question : The range of laboratory thermometer is:

(a) 70°C to 110°C
(b) -10°C to 110°C
(c) 20°C to 110°C
(d) None of these

Question : Which scale is used in clinical thermometer nowadays ?

(a) Celsius scale
(b) Fahrenheit scale
(c) Both (a) and (b)
(d) None of these

Question : Heat always flows

(a) from a colder object to a hotter object
(b) from a hotter object to a colder object
(c) in both the directions
(d) heat never flows from one object to other

Question : In solids, heat transfer takes place primarily due to

(a) conduction
(b) convection
(c) radiation
(d) none of these

Question : Land breeze blows from

(a) lower surface to upper surface
(b) sea to land
(c) upper surface to lower surface
(d) land to sea

Question : The process of transferring of heat without any contact between the source of heat and the heated object is called

(a) conduction
(b) convection
(c) radiation
(d) induction

Question : A wooden spoon is dipped in cup of ice-cream, its other end

(a) Does not become cold
(b) Become cold by radiation
(c) Become cold by convection
(d) Become cold by conduction

Question : The heat is transferred directly from its source to another place without help of any substance in between, without a medium is:

(a) convection
(b) conduction
(c) radiation
(d) none of these

Question : A device used to measure the temperature is

(a) transistor
(b) thermometer
(c) mercury
(d) none of these

Question : Which type of cloth is preferred in summer?

(a) Silk clothes
(b) Cotton clothes
(c) Nylon clothes
(d) Polyester clothes