What happens to the volume of a substance when it is heated?
a) It decreases
b) It remains constant
c) It increases
d) It evaporates
The change in the length of an object due to thermal expansion is directly proportional to:
a) Its original length
b) The temperature change
c) The material’s coefficient of thermal expansion
d) All of the above
Which of the following materials has a higher coefficient of thermal expansion?
a) Metal
b) Glass
c) Rubber
d) Wood
Thermal expansion in solids primarily occurs due to:
a) Movement of particles
b) Increase in particle mass
c) Decrease in the intermolecular distance
d) Increase in the number of particles
The formula for linear expansion of an object is:
a) ΔL = L₀ × α × ΔT
b) ΔL = α × ΔT
c) ΔV = α × ΔT
d) ΔL = α × L₀ × ΔT
Which of the following is most affected by thermal expansion?
a) Metal pipes
b) Concrete buildings
c) Liquid in a thermometer
d) All of the above
In the formula ΔL = L₀ × α × ΔT, what does “α” represent?
a) The initial temperature
b) The final length
c) The coefficient of linear expansion
d) The change in temperature
What happens to the density of a material when it undergoes thermal expansion?
a) It increases
b) It decreases
c) It remains constant
d) It becomes unstable
Thermal expansion in liquids and gases occurs primarily due to:
a) Movement of electrons
b) Increase in molecular movement
c) Decrease in intermolecular forces
d) Increase in gas pressure
The coefficient of volumetric thermal expansion refers to:
a) The change in length per unit length per degree Celsius
b) The change in area per unit area per degree Celsius
c) The change in volume per unit volume per degree Celsius
d) The change in temperature
What is the primary cause of expansion in solids during heating?
a) Increase in the vibration of molecules
b) Decrease in atomic bond strength
c) Increase in particle mass
d) Decrease in particle velocity
Which of the following is an example of thermal expansion in liquids?
a) A metal rod becoming longer
b) Water rising in a thermometer
c) Concrete cracking
d) A balloon expanding when heated
In which material would thermal expansion be least noticeable?
a) Metal
b) Wood
c) Glass
d) Ceramic
What is the effect of thermal expansion on the volume of a gas?
a) It decreases
b) It remains constant
c) It increases
d) It depends on the temperature only
What happens to a material’s coefficient of thermal expansion when its temperature increases?
a) It increases
b) It decreases
c) It remains constant
d) It varies unpredictably
When an object expands due to heat, its internal energy:
a) Decreases
b) Increases
c) Remains constant
d) Becomes unpredictable
The expansion of water from 0°C to 4°C is an example of:
a) Normal thermal expansion
b) Anomalous behavior
c) Isometric expansion
d) Volumetric expansion
The expansion of a material can be minimized by:
a) Increasing temperature
b) Decreasing temperature
c) Using materials with low coefficients of thermal expansion
d) Using materials with high coefficients of thermal expansion
Which material would expand the most when heated?
a) Concrete
b) Water
c) Aluminum
d) Steel
What happens to a metal rail when heated in summer?
a) It contracts
b) It expands
c) It remains the same size
d) It changes shape
In the formula ΔV = β × V₀ × ΔT, what does “β” represent?
a) The coefficient of linear expansion
b) The coefficient of volume expansion
c) The change in volume
d) The initial volume
When a metal rod expands, what happens to the distance between the molecules?
a) It decreases
b) It remains constant
c) It increases
d) It fluctuates
In which case is thermal expansion most significant?
a) Small temperature changes
b) Materials with low coefficients of expansion
c) Large temperature changes
d) Insulated materials
What happens to the pressure of a gas when it undergoes thermal expansion at constant volume?
a) The pressure decreases
b) The pressure increases
c) The pressure remains constant
d) The pressure fluctuates
Which of the following does not cause thermal expansion?
a) Increase in temperature
b) Increase in particle motion
c) Change in pressure
d) Decrease in intermolecular forces
Which of the following is an application where thermal expansion is taken into account?
a) Bridges
b) Car engines
c) Thermometers
d) All of the above
In which direction does the expansion of a solid occur when heated?
a) In all directions
b) Only along the length
c) Only along the width
d) Only along the height
What happens to the density of a gas as it undergoes thermal expansion?
a) It increases
b) It decreases
c) It remains constant
d) It fluctuates
When is the coefficient of thermal expansion for a material most significant?
a) At high temperatures
b) At low temperatures
c) At constant volume
d) At constant pressure
