NCERT PHYSICS - HEAT - CLASS 7 EXAM 2025 WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST ALREADY
GRADED A+ ||RANKED!!!
Heat - SOLUTION-The flow of energy between two objects or systems due to a temperature
difference.
thermometers measure temperature _______________ - SOLUTION-By exploiting property of
matter that is temp. dependent
Temperature Scale - SOLUTION-Calibrated scale marked on a thermometer
Calibration of Thermometers - SOLUTION-Using fixed points like melting point of ice or boiling
point of water
Fixed Points on Thermometer - SOLUTION-ice point (melting point of ice) and steam
point(boiling point of water)
Temperature Scales - SOLUTION-Celsius, Fahrenheit, Kelvin
, freezing point - SOLUTION-The temperature at which a liquid changes into a solid state melting
point - SOLUTION-the temperature at which a solid state changes into a liquid state
Fixed points of Fahrenheit Scale - SOLUTION-Water freezes at 32 F and boils at 212 F
Fixed points of Celsius scale - SOLUTION-Water freezes at 0 C and boils at 100 C
Fixed points of Kelvin scale - SOLUTION-Water freezes at 273 K and boils around 373 K
absolute zero - SOLUTION-Minimum possible temperature where there is no heat and motion of
particles ceases
Conversions - SOLUTION-C/5 = F-32/9 = K-273/5 (T- LFP/UFP - LFP)
Disadvantages of Measuring Temp. With Hand - SOLUTION-Cannot withstand large range of
temperatures, not precise enough
Temperature - SOLUTION-measure of hotness or coldness of an object.
Kelvin - SOLUTION-SI unit for temperature
Common units of temperature - SOLUTION-Celsius and Fahrenheit
Thermal equilibrium - SOLUTION-When two objects are at the same temperature and there is no
net flow of energy between them
QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST ALREADY
GRADED A+ ||RANKED!!!
Heat - SOLUTION-The flow of energy between two objects or systems due to a temperature
difference.
thermometers measure temperature _______________ - SOLUTION-By exploiting property of
matter that is temp. dependent
Temperature Scale - SOLUTION-Calibrated scale marked on a thermometer
Calibration of Thermometers - SOLUTION-Using fixed points like melting point of ice or boiling
point of water
Fixed Points on Thermometer - SOLUTION-ice point (melting point of ice) and steam
point(boiling point of water)
Temperature Scales - SOLUTION-Celsius, Fahrenheit, Kelvin
, freezing point - SOLUTION-The temperature at which a liquid changes into a solid state melting
point - SOLUTION-the temperature at which a solid state changes into a liquid state
Fixed points of Fahrenheit Scale - SOLUTION-Water freezes at 32 F and boils at 212 F
Fixed points of Celsius scale - SOLUTION-Water freezes at 0 C and boils at 100 C
Fixed points of Kelvin scale - SOLUTION-Water freezes at 273 K and boils around 373 K
absolute zero - SOLUTION-Minimum possible temperature where there is no heat and motion of
particles ceases
Conversions - SOLUTION-C/5 = F-32/9 = K-273/5 (T- LFP/UFP - LFP)
Disadvantages of Measuring Temp. With Hand - SOLUTION-Cannot withstand large range of
temperatures, not precise enough
Temperature - SOLUTION-measure of hotness or coldness of an object.
Kelvin - SOLUTION-SI unit for temperature
Common units of temperature - SOLUTION-Celsius and Fahrenheit
Thermal equilibrium - SOLUTION-When two objects are at the same temperature and there is no
net flow of energy between them
