You stand on the seat of a chair and then hop off.
A) During the time you are in flight down to the floor, the Earth moves toward you with what acceleration?
B) The Earth moves toward you through what distance?

Explanation:

A ) When a person is falling under gravity , he goes close to the earth with acceleration 9.8 m /s² . Here we assume that earth is stationary , though it is not . We can also say that earth is moving towards the person with acceleration 9.8 m /s² . The displacement or movement is a relative measurement . So is acceleration .

So the answer to first question is 9.8 m /s²

B ) Displacement of person in this case towards the earth is equal to height of the chair . Here we assume that earth is stationary ,  though earth is not stationary . It is constantly moving around the sun.  Similarly we can also say that earth has moved towards the person by distance equal to height of the chair , if we consider person to be stationary.

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.

i will answer your question if you answer mine