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WorksheetsP4 Heat
Total questions: 43
Worksheet time: 24mins
at the same level of the liquid in the stem.
at the bulb.
at the top of the thermometer.
wherever you want.
putting out
Plastic is a _____________ conductor of heat.
poor
good
Which material is best used to keep cold drinks from getting warm too quickly?
glass, because it is a good conductor of heat
foam, because it is a poor conductor of heat
metal, because it radiates heat
paper, because it conducts heat
Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?
Heat energy transfers from the metal spoon to the hot liquid.
Heat energy transfers from the hot tea to the spoon.
Heat energy transfers from the air to the hot liquid, and then to the spoon.
Heat energy transfers from the hot liquid to the cup, and then to the spoon.
TB 127: When heated, the brass ................................ ......................... than the iron strip, causing the bimetallic strip to bend.
contracts more
contracts less
expands more
expands less
How can you open the tight metal cap of a ketchup bottle?
Heat the cap only
Cool the cap only
Heat the bottle only
Heat the bottle and cap
Is heat lost or gained by you when you enter an air-con room?
heat is gained
heat is lost
Where does most of our heat come from?
the water
the sun
the land
What happen to the metal ball during heating?
The metal ball gain heat and expands
The metal ball gain heat and contracts
The metal ball lose heat and expands
The metal ball gain heat and contracts
Which of the following is not a source of heat?
Hot water entered the dented ping pong ball and inflated the ball.
The dented surface of the ping pong ball gain heat and cracked.
Air in the dented ping pong ball lose heat to the hot water, contacted and inflated the ball.
Air in the dented ping pong ball gain heat from the hot water, expanded and inflated the ping pong ball.
You place a metal straw into a glass of iced water. The straw becomes cooler after a while.
What one of the following explains this?
The cold water loses heat to the straw.
The straw loses heat to the cold water.
The cup gains heat from the cold water.
The straw gains heat from the cold water.
A metal rod was inserted into a cup of water.
The temperature of the metal rod increased.
Which statement is true to cause the temperature of the metal rod to increase?
The water had a lower temperature than the metal rod.
The water had a higher temperature than the metal rod.
The mass of the metal rod was higher than the mass of water.
The mass of the water was higher than the mass of metal rod.
Look at the diagram.
Shakeel needs help to separate two glasses, A (inside) and B (outside), which are stuck together. What is the best way to separate them?
Pour hot water into A and put B in a basin of hot water.
Pour hot water into A and put B in a basin of cold water.
Pour cold water into A and put B in a basin of cold water.
Pour cold water into A and put B in a basin of hot water.
A cement floor would feel colder than a floor with carpet on a cold morning as the cement floor _______________________.
is smooth while the floor with carpet is not.
reflects more heat than the floor with carpet.
is a poorer conductor of heat than the floor with carpet.
is a better conductor of heat than the floor with carpet.
The drink stall owner wants to keep his bottled drinks cold during recess.
Which container should he use to keep his bottled drinks chilled for the longest time?
P
Q
R
S
Which one of the following explains what likely happens to the contents of the above bottle on a hot day?
Water in the bottle expands
Air in the bottle expands
Water in the bottle expands
Air in the bottle is compressed
Water in the bottle contracts
Air in the bottle expands
Water in the bottle contracts
Air in the bottle is compressed
