Thermal Expansion
Physics ⇒ Heat and Thermodynamics
Thermal Expansion starts at 7 and continues till grade 12.
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See sample questions for grade 7
Describe one way thermal expansion is useful in everyday life.
Describe what happens to the volume of air in a balloon when it is heated.
Explain why a bimetallic strip bends when heated.
Explain why gaps are left between sections of railway tracks.
A metal rod is 2 meters long at 20°C. If it expands by 0.002 meters when heated to 100°C, what is the change in length?
A steel rod of length 1 m expands by 1 mm when heated. What is the new length?
If a bridge is 100 meters long and expands by 0.01% in summer, how much does it expand?
If a metal ball just fits through a ring at room temperature, what will happen if both are heated equally? (1) The ball will not pass (2) The ball will pass more easily (3) The ring will shrink (4) The ball will melt
A glass jar has a metal lid that is stuck. Which method will help open it? (1) Cool the lid (2) Heat the lid (3) Hit the lid (4) Shake the jar
A liquid thermometer works because: (1) The liquid contracts when heated (2) The liquid expands when heated (3) The glass expands more than the liquid (4) The liquid evaporates
If a glass bottle is filled to the brim with water and both are heated, what is likely to happen? (1) The water will overflow (2) The bottle will break (3) Nothing will happen (4) The water will freeze
If a metal ball just fits through a ring at room temperature, what will happen if both are heated equally? (1) The ball will not pass (2) The ball will pass more easily (3) The ring will shrink (4) The ball will melt
Fill in the blank: The expansion of a liquid is usually measured in terms of ________ expansion.
Fill in the blank: The expansion of a solid in one direction is called ________ expansion.
The expansion of a material in all directions is called ________ expansion.
The increase in length of a solid due to heating is called ________ expansion.
True or False: All materials expand by the same amount when heated.
True or False: Bridges have expansion joints to allow for thermal expansion.
True or False: Gases expand less than solids when heated.
True or False: The expansion of gases is used in hot air balloons to make them rise.
