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Coefficient of thermal expansion. The coefficient of thermal expansion describes how the size of an object changes with a change in temperature. Specifically, it measures the fractional change in size per degree change in temperature at a constant pressure. Several types of coefficients have been developed: volumetric, area, and linear.
1 Importance of diffusion to living organisms 3 star(s) Gas exchange is one of these processes. It is when much needed oxygen is obtained by the body in order for respiration to take place and the waste CO2 is taken out of the body. 2  Investigating osmosis on swede cells. These variables include: * The temperature.