7th Grade > Physics
HEAT MCQs
Total Questions : 118
| Page 7 of 12 pages
Answer: Option B. ->
Thermometer
:
B
A thermometer is an instrument used for measuring temperature. Some of the common thermometers used are clinical, lab and digital thermometer.
A manometer is an instrument used to measure pressure differences.
An ammeter is used to measure current.
A stethoscope is an acoustic medical device used for listening to the internal sounds of an animal or human body.
:
B
A thermometer is an instrument used for measuring temperature. Some of the common thermometers used are clinical, lab and digital thermometer.
A manometer is an instrument used to measure pressure differences.
An ammeter is used to measure current.
A stethoscope is an acoustic medical device used for listening to the internal sounds of an animal or human body.
Answer: Option C. ->
Max-Min or Six's thermometer
:
C
A Max-Min or Six's thermometer is used to measure the maximum and minimum temperatures of the day.
The Six's thermometer is a registering thermometer which can record the maximum and minimum temperatures reached over a period of time, for example, 24 hours. It is used to record the extremes of temperature at a location.
:
C
A Max-Min or Six's thermometer is used to measure the maximum and minimum temperatures of the day.
The Six's thermometer is a registering thermometer which can record the maximum and minimum temperatures reached over a period of time, for example, 24 hours. It is used to record the extremes of temperature at a location.
Answer: Option A. ->
conductor
:
A
:
A
A conductor allows heat to pass through it whereas an insulator obstructs the passage of heat. A radiator is a substance which emits heat or light.
Answer: Option D. ->
does not become cold
:
D
The other end of wooden spoon does not become cold as wood is a poor conductor of heat and electricity and hence, it belongs to the category of insulators.
:
D
The other end of wooden spoon does not become cold as wood is a poor conductor of heat and electricity and hence, it belongs to the category of insulators.
Answer: Option C. ->
temperature
:
C
Temperature is a measure of the degree of hotness or coldness of a body. It is proportional to the average kinetic energy of all the molecules present in an object. It is represented according to a comparative scale and is measured by a thermometer.
:
C
Temperature is a measure of the degree of hotness or coldness of a body. It is proportional to the average kinetic energy of all the molecules present in an object. It is represented according to a comparative scale and is measured by a thermometer.
Answer: Option A. ->
Land
:
A
:
A
Land cools down faster than water. As a result during night, the air above land becomes cooler than that above sea. So, a breeze blows from land to sea and we call that land-breeze.
Answer: Option C. ->
sublimation
:
C
:
C
Sublimation is a process where a solid turns into a gas without going through a liquid stage. Solid carbon dioxide which is more commonly known as "dry ice" sublimates at room temperature.
Answer: Option C. ->
radiation
:
C
Radiation is the mode of heat transfer between the earth and the sun. Radiation is a method of heat transfer that does not rely upon any contact between the source and the object. The transfer of heat by radiation does not require any medium. It can take place whether a medium is present or not.
:
C
Radiation is the mode of heat transfer between the earth and the sun. Radiation is a method of heat transfer that does not rely upon any contact between the source and the object. The transfer of heat by radiation does not require any medium. It can take place whether a medium is present or not.
Answer: Option C. ->
radiation
:
:
The temperature of the human body does not generally go below 35∘C or above 42∘C.
Answer: Option C. ->
radiation
:
:
Conduction: 1 Mark
Difference: 1 Mark
The process by which heat is transferred from hotter end to the colder end of an object is known as conduction. It takes place usually in solids.
Conduction requires a medium for the heat to be transferred. Radiation does not require any medium for the heat to be transferred.
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