(Q).
Given the fact that:  Warm water cant hold as much dissolved oxygen as cool water, so an increase in the temperature of water decreases the amount of oxygen it contains.  Answer the question:   The warmest or coldest waters have the least dissolved oxygen?
(A).
warmest


(Q).
Given the fact that:  If the gas is heated, the particles will move faster as they gain more energy.  Answer the question:   If John heats a gas in his bunsen burner, what would happen to the gas particles they would move faster or they would move slower?
(A).
they would move faster


(Q).
Given the fact that:  Water becomes more dense when it is colder and when it has more salt.  Answer the question:   What happens to water when it absorbs salt lower density or Higher Density?
(A).
Higher Density