WorksheetsHeat
Total questions: 69
Worksheet time: 2hrs 18mins
Name
Class
Date
1.
The transfer of energy due to temperature difference is called?
a)
Work
b)
Heat
c)
Power
d)
Force
2.
Heat flows from?
a)
Lower temp to higher temp
b)
Higher temp to lower temp
c)
Any direction
d)
Only solid to liquid
3.
Which device is used to measure heat change?
a)
Thermometer
b)
Barometer
c)
Calorimeter
d)
Manometer
4.
The SI unit of heat is?
a)
Calorie
b)
Joule
c)
Watt
d)
Kelvin
5.
1 calorie is equal to?
a)
2.1 J
b)
4.2 J
c)
42 J
d)
0.42 J
6.
1000 calories is equal to?
a)
1 Joule
b)
1 Calorie
c)
1 Kilocalorie
d)
1 Kelvin
7.
The unit of energy in food packets is usually provided in __________
a)
Joules
b)
Calories
c)
Kilojoules
d)
Kelvins
8.
Which of the following is not true?
a)
Heat is energy
b)
Heat flows hot to cold
c)
Heat can be directly measured
d)
Heat can cause change
9.
The degree of hotness or coldness of an object is?
a)
Heat
b)
Temperature
c)
Energy
d)
Calorimetry
10.
Which instrument is used to measure temperature?
a)
Manometer
b)
Calorimeter
c)
Thermometer
d)
Anemometer
11.
The SI unit of temperature is?
a)
Joule
b)
Kelvin
c)
Calorie
d)
Celsius
12.
Freezing point of water in Fahrenheit scale?
a)
0°F
b)
32°F
c)
100°F
d)
212°F
13.
Boiling point of water in Kelvin scale?
a)
373K
b)
273K
c)
100K
d)
212K
14.
Absolute zero in Celsius is?
a)
-100°C
b)
-273°C
c)
0°C
d)
273°C
15.
Formula to convert Celsius to Fahrenheit?
a)
°F = (9/5 × °C) + 32
b)
°F = (5/9 × °C) + 32
c)
°C = (9/5 × °F) + 32
d)
K = °C + 32
16.
Formula to convert Fahrenheit to Celsius?
a)
°C = 5/9 × (°F – 32)
b)
°C = (°F × 9/5) + 32
c)
°F = 9/5 × °C
d)
K = °C + 273
17.
Formula to convert Celsius to Kelvin?
a)
K = °C – 273
b)
K = °C + 273
c)
K = °C × 273
d)
K = °C / 273
18.
At what temperature does water boil in Fahrenheit scale?
a)
100°F
b)
373°F
c)
212°F
d)
32°F
19.
Which thermometer is used to measure lava temperature?
a)
Mercury thermometer
b)
Alcohol thermometer
c)
Thermocouple
d)
Digital thermometer
20.
Which of the following is correct about heat and temperature?
a)
Heat is measured in °C
b)
Temperature is energy
c)
Heat is energy, temperature is degree of hotness
d)
Both are same
21.
The major source of heat on Earth is?
a)
Moon
b)
Stars
c)
Sun
d)
Fire
22.
Substances that catch fire easily are called?
a)
Non-flammable
b)
Flammable
c)
Solidified
d)
Condensed
23.
The minimum temperature at which a substance catches fire is called?
a)
Melting point
b)
Ignition temperature
c)
Boiling point
d)
Freezing point
24.
Which of these is a non-flammable substance?
a)
Paper
b)
Wood
c)
Stone
d)
Petrol
25.
When an object is heated, its particles?
a)
Stop moving
b)
Move slower
c)
Move faster
d)
Remain fixed
26.
Change of state from solid to liquid is called?
a)
Condensation
b)
Sublimation
c)
Melting
d)
Freezing
27.
During melting, temperature of the substance?
a)
Increases
b)
Decreases
c)
Remains constant
d)
Doubles
28.
The melting point of ice is?
a)
-273°C
b)
0°C
c)
100°C
d)
32°C
29.
Change of state from vapour to liquid is called?
a)
Boiling
b)
Condensation
c)
Sublimation
d)
Melting
30.
Clouds, fog, and dew are examples of?
a)
Condensation
b)
Evaporation
c)
Sublimation
d)
Solidification
31.
Change of state from liquid to vapour at boiling point is called?
a)
Evaporation
b)
Melting
c)
Boiling
d)
Condensation
32.
The boiling point of water is?
a)
0°C
b)
78°C
c)
100°C
d)
357°C
33.
The boiling point of alcohol is?
a)
78°C
b)
100°C
c)
273°C
d)
357°C
34.
The change of liquid to vapour at any temperature below boiling point is?
a)
Boiling
b)
Condensation
c)
Evaporation
d)
Freezing
35.
Which process causes cooling?
a)
Melting
b)
Evaporation
c)
Condensation
d)
Freezing
36.
Boiling is a ____ process?
a)
Slow
b)
Fast
c)
No change
d)
Cooling
37.
Evaporation takes place at?
a)
Boiling point
b)
Surface of liquid
c)
Throughout liquid
d)
Only in solids
38.
The change from liquid to solid by release of heat energy is called?
a)
Condensation
b)
Sublimation
c)
Freezing
d)
Boiling
39.
The freezing point of water is?
a)
0°C
b)
100°C
c)
273°C
d)
54°C
40.
The direct change of solid to gas without liquid state is?
a)
Melting
b)
Condensation
c)
Sublimation
d)
Solidification
41.
Dry ice is an example of?
a)
Condensation
b)
Sublimation
c)
Melting
d)
Evaporation
42.
The reverse process of sublimation is?
a)
Melting
b)
Evaporation
c)
Deposition
d)
Condensation
43.
Thermal expansion means?
a)
Change in size due to heat
b)
Change in color due to heat
c)
Change in weight due to heat
d)
No effect
44.
Telephone wires sag in?
a)
Winter
b)
Summer
c)
Rainy season
d)
Autumn
45.
Bridges are kept on rollers to?
a)
Prevent accidents
b)
Allow expansion and contraction
c)
Reduce load
d)
Absorb heat
46.
Which expands the most when heated?
a)
Solids
b)
Liquids
c)
Gases
d)
Metals
47.
A balloon fixed to a bottle expands when placed in?
a)
Cold water
b)
Hot water
c)
Ice
d)
Vacuum
48.
Heat transfer without a medium is called?
a)
Conduction
b)
Convection
c)
Radiation
d)
Reflection
49.
Dark, rough, dull surfaces are?
a)
Good reflectors
b)
Poor absorbers
c)
Good absorbers and emitters
d)
Always cold
50.
The transfer of heat between objects in direct contact is called?
a)
Convection
b)
Radiation
c)
Conduction
d)
Evaporation
51.
Heat transfer in solids mainly occurs by?
a)
Conduction
b)
Radiation
c)
Convection
d)
Reflection
52.
Free electrons in metals help in?
a)
Radiation of heat
b)
Absorption of heat
c)
Conduction of heat
d)
Convection of heat
53.
The state when no net heat flows between objects is called?
a)
Equilibrium state
b)
Thermal equilibrium
c)
Static state
d)
Neutral state
54.
Which of these is a good conductor of heat?
a)
Wood
b)
Stone
c)
Silver
d)
Glass
55.
Which of these is a bad conductor of heat?
a)
Copper
b)
Aluminium
c)
Air
d)
Silver
56.
The handles of cooking utensils are made of?
a)
Iron
b)
Wood or plastic
c)
Copper
d)
Aluminium
57.
Woollen clothes keep us warm because they?
a)
Generate heat
b)
Absorb sunlight
c)
Trap air (a bad conductor)
d)
Reflect heat
58.
Heat transfer in fluids takes place mainly by?
a)
Radiation
b)
Convection
c)
Conduction
d)
Absorption
59.
Sea breeze occurs during?
a)
Day
b)
Night
c)
Both
d)
Morning only
60.
Land breeze occurs during?
a)
Day
b)
Night
c)
Evening
d)
Afternoon
61.
Ventilators are kept high in rooms to allow?
a)
Cold air in
b)
Hot air out
c)
Both cold air in and hot air out
d)
Air circulation to stop
62.
Radiation is the transfer of heat?
a)
Only in solids
b)
With a medium
c)
Without a medium
d)
By convection currents
63.
Which heat transfer process works in a vacuum?
a)
Conduction
b)
Convection
c)
Radiation
d)
None
64.
Dark, rough, dull surfaces are?
a)
Good reflectors
b)
Good absorbers and emitters
c)
Poor absorbers
d)
Poor emitters
65.
Polished, shiny surfaces are?
a)
Good absorbers
b)
Poor reflectors
c)
Good reflectors
d)
Good emitters
66.
Petrol storage tanks are made shiny to?
a)
Absorb heat
b)
Reflect heat
c)
Emit heat
d)
Trap air
67.
Which of the following prevents all three modes of heat transfer?
a)
Glass cover
b)
Vacuum flask (thermos)
c)
Metal box
d)
Plastic cover
68.
Vacuum in a thermos flask reduces?
a)
Conduction only
b)
Convection and conduction
c)
Radiation only
d)
All modes of heat transfer
69.
The silver coating in a thermos flask reduces?
a)
Conduction
b)
Radiation
c)
Convection
d)
Evaporation
100 %
