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WorksheetsHeat (quiz -2) by Prabhakar
Total questions: 25
Worksheet time: 13mins
Phase change from gas to liquid is called
Evaporation
Condensation
Boiling
Freezing
Which is the opposite of condensation?
melting
evaporation
precipitation
transpiration
Cool air holds more water vapor than warm air.
True
False
An example of condensation that is formed from droplets which you can see on leaves early in the morning
fog
cloud
dew
rain
Clothes dry easily when exposed to sunlight is an example of _____________________.
condensation
evaporation
melting
Boiling
A: we feel cool after sweating
R: Evaporation is the cooling phenomenon
Both A and R are true
A is true; R is false
A is false: R is true
Both A and R are false
Condensation takes place on dust particles forms a thick mist. this thick mist is called as ----
cloud
fog
dew
ice
The amount of water vapour present in air is called -----
humidity
pollution
fog
dew
What is the boiling point of water
0 C
100 F
100 K
100 C
Phase change from liquid to gas at constant temperature is known as
evaporation
melting
condensation
boiling
Latent heat of vaporization of water is ......
80 cal/gm.
100 cal/gm
540 cal/gm
273 cal/gm.
The heat energy required to change the state of matter without change in temperature is called as -----
boiling temperature
melting point
specific heat
latent heat
SI unit of latent heat is ----
J/Kg.k
J/Kg
cal/gm0C
cal/gm
Melting Point of water is
100 degrees Celsius
0 degrees Celsius
0 degrees Fahrenheit
0 degrees kelvin
A substance has a melting point of 25 oC and a boiling point of 235 oC. What state is it at 5oC?
Solid
Liquid
Gas
both solid and gas
During melting, energy is
released
absorbed
stays the same
zero
The latent heat of fusion of ice is ----
0 cal/gm
80 cal/gm
273 cal/gm.
540 cal/gm
The heat energy required to convert 1 gm. of solid completely into liquid at a constant temperature is called .....
melting point
boiling point
latent heat of fusion
latent heat of vaporisation
Ice floats on water because
density of ice is less than that of water
density of ice is greater than that of water
density of ice and water is equal
ice is in solid state
water ------- on freezing
contracts
expands
no change
none
During melting of ice, temperature ----
Increases
Decreases
does not change
may increase or decrease
The average kinetic energy of the molecules is directly proportional to ---
physical state
absolute temperature
melting point
specific heat
The ------- behave like heat store houses for the earth.
forests
oceans
mountains
deserts
