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WorksheetsHeat 2021 LSS NT
Total questions: 31
Worksheet time: 20mins
In heat transfer, heat always flows from the _______________ object to the _______________ object.
hotter / colder
colder / hotter
hotter / hotter
colder / colder
How does heat move?
from a warmer to a cooler object
from a cooler to a warmer object
toward a hot object
away from a cold object
All of the following state the importance of heat EXCEPT one. Which is it?
Heat can dry our wet hair.
Heat is used to fry nuggets.
Heat can make our room cool.
All of the following state the importance of heat EXCEPT one. Which is it?
Heat can dry our wet hair.
Heat is used to fry nuggets.
Heat can make our room cool.
Animals and humans need the sun’s heat energy in order to survive.
True
False
What can be done to ensure that the tracks do not become crooked like this? You may choose more than one answer.
Expansion gap should be included between tracks.
Rollers should be placed below the train tracks.
A longer track should be used.
Ensure that the track made of one continuous piece of metal only
Lisa has a bottle of water. How can she increase the heat energy of the water?
She can pour the water into a larger bottle.
She can increase the temperature of the water.
She can place the bottle of water in the refrigerator.
She can divide the water between tow identical containers.
How does heat move?
from a warmer to a cooler object
from a cooler to a warmer object
toward a hot object
away from a cold object
Temperature is a measure of the degree of
Energy only
Hotness or coldness
Hotness only
Energy and hotness
Two objects touching each other have the same temperature. Which statement is true?
Heat flows between the two objects.
There is no heat transfer between the two objects.
Heat flows from one object to the other.
Coldness flows from one object to the other.
How does heat flow?
block R to block S
block S to block R
heat does not flow between them
How does heat flow?
object C to object D
object D to object C
heat does not flow between them
How does heat flow?
object P to object Q
object Q to object P
heat does not flow between them
Metal X expands more than metal Y. What happens when a bimetallic strip made up of X and Y is heated?
Bend upwards
Bend downwards
Does not bend
What is the function of a thermostat?
Increase temperature
Maintain temperature
Decrease temperature
To carry out its function, a thermostat is usually made up of
Metal
Non-metal
Bimetallic strip
Metal strip
An electric iron has a (a) to maintain temperature.
When water in the flask was cooled down, the water level dropped because ______________.
the water gained heat and expanded
the water lost heat and expanded
the water gained heat and contracted
the water lost heat and contracted
A bottle of air is connected to a balloon. When the bottle is placed in hot water, ______________.
the air in the balloon gained heat and the balloon expanded
the air in the balloon lost heat and the balloon expanded
the air in the balloon gained heat and the balloon contracted
the air in the balloon lost heat and the balloon contracted
Expansion can be a problem in
Power cable
Railway tracks
Fire alarm
Contraction can be a problem in
Power cable
Railway tracks
Fire alarm
Expansion can be a benefit in
Power cable
Railway tracks
Fire alarm
The small gaps between tracks of train enable the tracks to ______________ and preventing any damage.
contract
expand
longer
shorter
Immerse the lid of a bottle in _______________ to make it expand and loosen it.
cold water
hot water
liquid soap
vinegar
When the oven becomes hot, the bimetallic strip bends upwards. The electrical contacts no longer touch, the circuit is (a)
There is also a gap to allow for (a)
The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....
bend downwards, complete the circuit and the alarm rings.
bend upwards, open the circuit and the alarm will not ring.
becomes longer, open the circuit and the alarm will not ring.
