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Thermal Energy [2]

Total questions: 29

Worksheet time: 16mins

Name
Class
Date
1.
Radiation is a method of thermal energy transfer that moves -
a)
through empty space.
b)
when objects touch.
c)
only through solids.
d)
in the motion of fluids.
2.
Which of following is a conductor?
a)
Wooden Stick
b)
Styrofoam Cooler
c)
Metal Pot
d)
Plastic Container
3.

What type of heat transfer is happening at "A"

a)

conduction

b)

convection

c)

radiation

4.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
5.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
6.
What is the SI unit for temperature?
a)
Kelvin
b)
Celcius
c)
Fahrenheit
d)
All of these
7.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
8.
A high specific heat means...
a)
It requires less energy to change temperature
b)
It requires more energy to change temperature
c)
It heats up very quickly
9.
3. If the atoms of an object are moving or vibrating fast, the temperature would be...
a)
Hot
b)
Cold
c)
Unknown
10.
4. If the atoms of an object are moving or vibrating slow, the object would feel...
a)
Cold
b)
Hot
c)
Unknown
11.
What is Thermal Contraction 
a)
A Potato
b)
A decrease in a materials  volume when its temperature decreases 
c)
The movement of fluids in a cycle because of convection 
d)
A material through which  thermal energy does not flow easily.
12.
What is Thermal expansion?
a)
The transfer of thermal energy between materials by the collisions of particles 
b)
Is a decrease in a materials volume when temperature decreases 
c)
An increase in a materials volume when temperature increases
d)
Chicken fried rice
13.
Objects gain heat and _________. 
a)
expand
b)
contract
14.

An increase in the volume of a material due to a temperature increase in the material.

a)

Thermal contraction

b)

Thermal expansion

c)

Thermal heat

15.

The instrument used for measuring temperature

a)

barometer

b)

thermometer

c)

calorimeter

16.

When temperature increases, distance between molecules ______________.

a)

decreases

b)

increases

c)

stays the same

17.

When temperature decreases, distance between molecules ____________.

a)

increases

b)

decreases

c)

stays the same

18.

The device which automatically regulates temperature is ..

a)

thermometer

b)

thermostat

c)

thermal energy

19.

Thermostat contains ....................that consists of two different metals.

a)

radiator

b)

insulator coil

c)

bimetallic coil

20.

In the bimetallic coil , the ............metal expands more than the other.

a)

inner

b)

outer

c)

neither

21.

when heating the bimetallic coil , it .......

a)

uncurl

b)

curl

c)

drop down

22.

which cube has higher specific heat....

a)

cube A

b)

cube B

c)

A and B are the same specific heat

23.
Which is not involved in defrost system?
a)
Heater
b)
Timer
c)
Compressor
24.

which of the following are parts of a refrigerator ?

a)

Refrigerator pipes

b)

expansion valve

c)

condenser coils

d)

compressor

e)

All of them

25.

In refrigerators, the condenser coil ____________

a)

cools surrounding air

b)

transfers thermal energy to the air behind the refrigerator

c)

transfers thermal energy to inside the refrigerator

26.

in a refrigerator, liquid coolant must be _________________ to cool down food.

a)

freezed

b)

Vaporized

c)

melted

d)

condensed

27.

energy change in car engines is as follows,

a)

thermal to chemical then to kinetic

b)

chemical to thermal then to kinetic

c)

kinetic to thermal

28.

car engines are also called _________________

a)

power engines

b)

Internal combustion engines

c)

burning engine

d)

exothermic engine

29.

which part of the following is NOT from the main parts of car engines ?

a)

thermostat

b)

pistons

c)

spark plug

d)

intake valve

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