NCERT PHYSICS - HEAT - CLASS 7 | QUIZ SMART |
SCORE HIGH | GUARANTEED ACCURACY!
Temperature - Answer: measure of hotness or coldness of an object.
Kelvin - Answer: SI unit for temperature
Common units of temperature - Answer: Celsius and Fahrenheit
Thermal equilibrium - Answer: When two objects are at the same temperature and
there is no net flow of energy between them
Heat - Answer: The flow of energy between two objects or systems due to a
temperature difference.
thermometers measure temperature _______________ - Answer: By exploiting
property of matter that is temp. dependent
Temperature Scale - Answer: Calibrated scale marked on a thermometer
Calibration of Thermometers - Answer: Using fixed points like melting point of ice or
boiling point of water
Fixed Points on Thermometer - Answer: ice point (melting point of ice) and steam
point(boiling point of water)
Temperature Scales - Answer: Celsius, Fahrenheit, Kelvin
freezing point - Answer: The temperature at which a liquid changes into a solid state
1
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, melting point - Answer: the temperature at which a solid state changes into a liquid
state
Fixed points of Fahrenheit Scale - Answer: Water freezes at 32 F and boils at 212 F
Fixed points of Celsius scale - Answer: Water freezes at 0 C and boils at 100 C
Fixed points of Kelvin scale - Answer: Water freezes at 273 K and boils around 373 K
absolute zero - Answer: Minimum possible temperature where there is no heat and
motion of particles ceases
Conversions - Answer: C/5 = F-32/9 = K-273/5 (T- LFP/UFP - LFP)
Disadvantages of Measuring Temp. With Hand - Answer: Cannot withstand large range
of temperatures, not precise enough
Property of matter that vary with temperature - Answer: Colour of light emitted by a hot
object gives us an idea of the temp
How does liquid-in-glass thermometer work? - Answer: When thermometer is placed in
contact with a body, it reaches thermal equilibrium with the body. It consists of a mass of
liquid which expands with rise in temp. and contracts with drop in temp.
Parts of a liquid-in-glass thermometer - Answer: 1. Glass Tube
2. Capillary Tube
3. Bulb
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
SCORE HIGH | GUARANTEED ACCURACY!
Temperature - Answer: measure of hotness or coldness of an object.
Kelvin - Answer: SI unit for temperature
Common units of temperature - Answer: Celsius and Fahrenheit
Thermal equilibrium - Answer: When two objects are at the same temperature and
there is no net flow of energy between them
Heat - Answer: The flow of energy between two objects or systems due to a
temperature difference.
thermometers measure temperature _______________ - Answer: By exploiting
property of matter that is temp. dependent
Temperature Scale - Answer: Calibrated scale marked on a thermometer
Calibration of Thermometers - Answer: Using fixed points like melting point of ice or
boiling point of water
Fixed Points on Thermometer - Answer: ice point (melting point of ice) and steam
point(boiling point of water)
Temperature Scales - Answer: Celsius, Fahrenheit, Kelvin
freezing point - Answer: The temperature at which a liquid changes into a solid state
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, melting point - Answer: the temperature at which a solid state changes into a liquid
state
Fixed points of Fahrenheit Scale - Answer: Water freezes at 32 F and boils at 212 F
Fixed points of Celsius scale - Answer: Water freezes at 0 C and boils at 100 C
Fixed points of Kelvin scale - Answer: Water freezes at 273 K and boils around 373 K
absolute zero - Answer: Minimum possible temperature where there is no heat and
motion of particles ceases
Conversions - Answer: C/5 = F-32/9 = K-273/5 (T- LFP/UFP - LFP)
Disadvantages of Measuring Temp. With Hand - Answer: Cannot withstand large range
of temperatures, not precise enough
Property of matter that vary with temperature - Answer: Colour of light emitted by a hot
object gives us an idea of the temp
How does liquid-in-glass thermometer work? - Answer: When thermometer is placed in
contact with a body, it reaches thermal equilibrium with the body. It consists of a mass of
liquid which expands with rise in temp. and contracts with drop in temp.
Parts of a liquid-in-glass thermometer - Answer: 1. Glass Tube
2. Capillary Tube
3. Bulb
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
