8. At higher temperatures . A. particles in an object have less energy
B. particles in an object move faster
C. a gas contracts
D. particles vibrate slowly

B. particles in an object move faster

Explanation:

At higher temperatures, particles in an object moves faster.

Temperature is the degree of hotness or coldness of a body.

At higher temperature, the substance is very hot. Temperature is related to the heat energy content of a bodyAs the temperature increases, the average kinetic energy of the particles of system increases more and more. This is in compliance with the kinetic molecular theory of matter. Therefore, at higher temperatures, particles in an object move faster.

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)