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If the object is heated it will expand because the particles gain energy from the heat and move about more vigorously causing them to bump into each other and move further and further apart. When the substance is cooled (gets cold) the particles slow down and move closer and closer together causing the object to contract.
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What is the difference between thermal expansion and contraction?
Thermal expansion is the increase in size of a material when it is heated, while thermal contraction is the decrease in size of a material when it is cooled. Expansion occurs due to increased kinetic energy of particles causing them to move further apart, while contraction occurs as particles lose kinetic energy and move closer together.
How does the particle model explains expansion and contraction?
The particle model explains expansion and contraction by understanding that in solids, particles are closely packed and vibrate in fixed positions. When heated, they gain energy and vibrate more vigorously, causing the material to expand. Conversely, when cooled, particles lose energy and vibrate less, leading to contraction.
What is the difference between contraction and expansion?
Contraction refers to a decrease in size or volume, while expansion refers to an increase in size or volume. In the context of economics, contraction can refer to a decrease in economic activity like during a recession, while expansion refers to a period of economic growth.
What is the force that causes exfoliation?
Exfoliation is primarily caused by a combination of thermal expansion and contraction due to daily temperature fluctuations. The heating of rock during the day causes expansion, while cooling at night causes contraction. This continuous expansion and contraction weaken the rock, leading to exfoliation.
How do objects expand or contract when heated?
When an object is heated, its particles gain energy and move more rapidly, causing them to spread out, leading to expansion of the object. Conversely, when an object is cooled, its particles lose energy and move more slowly, causing them to come closer together, leading to contraction of the object. This expansion and contraction process is due to changes in the average kinetic energy of the particles within the object.
