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 8
A bimetallic strip is made of two metals with different coefficients of expansion. When heated, what happens to the strip?
A brass rod and an iron rod of equal length are heated by the same amount. If brass has a higher coefficient of expansion, which rod will be longer after heating?
A metal ball just passes through a ring at room temperature. What happens if the ball is heated?
Describe what happens to the volume of air in a balloon if it is heated.
Explain why a tightly closed metal lid on a glass jar can be opened more easily by running it under hot water.
Explain why glass may crack when hot water is poured into it suddenly.
A brass rod and an iron rod of equal length are heated by the same amount. If brass has a higher coefficient of expansion, which rod will be longer after heating?
A metal ball just passes through a ring at room temperature. What happens if the ball is heated?
The expansion of a material depends on which of the following? (1) Initial length (2) Change in temperature (3) Type of material (4) All of the above
Which of the following expands the least for the same temperature rise? (1) Iron (2) Copper (3) Glass (4) Aluminum
Which of the following expands the most for the same temperature change? (1) Solids (2) Liquids (3) Gases (4) All expand equally
Which of the following is a correct statement about thermal expansion? (1) It only occurs in metals (2) It is always harmful (3) It can be useful in some devices (4) It does not occur in liquids
Fill in the blank: The ________ expansion of a material refers to the increase in its surface area due to heating.
Fill in the blank: The ________ of expansion is the amount a material expands per unit length per degree rise in temperature.
The expansion of a solid in all directions is called ________ expansion.
When a metal rod is heated, it becomes longer. This is an example of ________ expansion.
True or False: The coefficient of linear expansion is the same for all materials.
True or False: The expansion of a liquid in a thermometer is used to measure temperature.
True or False: The expansion of a material is directly proportional to the change in temperature.
True or False: The expansion of gases is used in hot air balloons to make them rise.
