Where do air masses form?you will get 74 points!

(most) air masses form over tropical or polar regions

When a large body of air remains over an area for several days or weeks, the body of air may change its thermal and moisture properties according to the land or water under it. The air exchanges heat with the land or water, either warming or cooling, until its temperature closely matches that of the surface below it. The body of air also gains or loses moisture depending on the temperature and moisture content of the surface. A body of air that resembles the characteristics of the surface under it is called an air mass.

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

truck y has a greater velocity than truck x.