When liquid water freezes, the average kinetic energy of its molecules _______, and the arrangement of the molecules become more orderly.

endothermic or exothermic? SOLID -> LIQUID

Increasing the number of particles of a gas will ________________ its pressure if the temperature and the volume are constant.

According to ____________ all particles of matter are in constant motion.

On the sun, where temperatures are extremely high, matter exists in a state known as ___________.

Describes how particles at the atomic level are arranged within most solids.

endothermic or exothermic? LIQUID -> SOLID

If the temperature and number of particles of gas in a cylinder do not change, and the volume of the cylinder is reduced by half, the pressure of the gas will be __________ as the original pressure.

The energy absorbed by one gram of water as it changes from its liquid phase into water vapor is known as the __________ (for water).

___________ is the energy of motion.

solid to liquid

solid to gas

TRUE or FALSE: When water vapor collects above the liquid in a container, the pressure caused by the collisions of this vapor and the walls of the container is called vapor pressure.