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 9
A liquid thermometer uses mercury. Why is mercury preferred over water for this purpose?
Describe one practical application of thermal expansion in everyday life.
Describe what happens to the volume of a gas if it is heated at constant pressure.
Explain why a glass bottle filled to the brim with liquid may overflow when heated.
A brass rod of length 1.5 m is heated from 25°C to 75°C. If the coefficient of linear expansion is 19 × 10⁻⁶ °C⁻¹, calculate the increase in length.
A glass jar has a metal lid that is stuck. Which method will help open it more easily? (1) Cool the lid (2) Heat the lid (3) Heat the jar (4) Cool the jar
A liquid thermometer uses mercury. Why is mercury preferred over water for this purpose?
A metal ball fits exactly through a ring at 20°C. What will happen if both are heated to 100°C? (1) Ball will not pass (2) Ball will pass easily (3) No change (4) Ball will shrink
A glass jar has a metal lid that is stuck. Which method will help open it more easily? (1) Cool the lid (2) Heat the lid (3) Heat the jar (4) Cool the jar
A metal ball fits exactly through a ring at 20°C. What will happen if both are heated to 100°C? (1) Ball will not pass (2) Ball will pass easily (3) No change (4) Ball will shrink
Which of the following expands the least for the same temperature rise? (1) Iron (2) Copper (3) Glass (4) Aluminum
Which of the following is NOT a consequence of thermal expansion? (1) Cracking of pavements (2) Bursting of water pipes in winter (3) Expansion joints in bridges (4) Bimetallic strips in thermostats
Fill in the blank: The coefficient of superficial (area) expansion is approximately ______ times the coefficient of linear expansion.
Fill in the blank: The expansion of a liquid is usually measured in terms of _______ expansion.
Fill in the blank: The expansion of a material depends on its _______ of expansion.
Fill in the blank: The expansion of a solid in all directions is called _______ expansion.
True or False: All materials expand at the same rate when heated.
True or False: The coefficient of expansion for a material is a constant value for all temperature ranges.
True or False: The coefficient of linear expansion is the same for all materials.
True or False: The expansion of a liquid is always greater than that of a solid for the same temperature change.
