Now build a model of salt. Place your materials on a sheet of paper. The regular-size marshmallows can represent the larger chlorine atoms, and the mini marshmallows can represent the smaller sodium atoms. Connect the marshmallows with toothpicks using the picture as a guide. What was difficult about building the model?

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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gravitational energy

electrical energy

kinetic energy

ligh energy

b

explanation: