Some particles are created via collisions. for instance, pions are created via collisions
with high energy protons and carbon, which releases neutrons and pions (which they
themself, decay into muons).
suppose two particles with momenta of p1 = (3,-1, 0, 0) kg and p2 = (2, 1, 1, 0) kg collide.
three particles are created as a result from this collision, two of which have momenta of
p3 = (1, 1, 0, 0) kg and p4 = (1,-0.5, 0, 0) kg, determine the four momentum, energy, rest
mass and three velocity of the third daughter particle.

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.

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