Define transition temperature.

Hint: Know the meaning of temperature, and the difference between temperature and
transition temperature.

Complete step by step answer:
Transition temperature: Temperature of transition is the temperature at which a substance
transitions from one crystal to another crystal state. More formally, it is the temperature at
which two crystalline shapes of a substance in equilibrium that coexists.
Additional information:
Calculation of transition temperature:
The temperature of the glass transformation is around minus ten degrees Celsius ($-{\rm{
}}10{\rm{ }}^\circ {\rm{C}}$) and can be calculated as the beginning of the transition in the
slope of the measuring curve or as the inflection point of the phase in the expansion
coefficient.
Temperature: Temperature is a physical phenomenon which expresses hot and cold in
quantitative terms. It is the expression of thermal energy, present in all substance, which is
the cause of heat phenomenon, a flood of air, when a body is in contact with a colder one.
Temperature is measured with a thermometer. The most common scales are the Celsius scale
(formerly called centigrade, $^\circ {\rm{C}}$, the Fahrenheit scale ($^\circ {\rm{F}}$), and
the Kelvin scale (K).
The lowest potential temperature is absolute zero, at which a body can-not produce any more
thermal energy.
Note: Temperature of transition is the temperature at which a substrate transitions from one
crystal (allotrope) state to another.
A material's glass-transition temperature ${T_g}$ identifies the spectrum of temperatures this
glass transition happens over. If one occurs it is usually greater than the melting temperature,
${T_m}$, of the material's crystalline state.