(Question)
Answer the question below: The warmest or coldest waters have the most dissolved oxygen? Assuming 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)
coldest

(Question)
Answer the question below: Dana is testing alkanes to see how they boil. She first heats up alkanes with more carbon atoms, and then some with fewer. The alkanes with fewer carbon atoms have a boiling point, compared to the other, that is lower or higher? Assuming that: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.
(Answer)
higher

(Question)
Answer the question below: Mike dove deeper and deeper into the ocean trench. As he goes lower, the pressure exerted on him by the water increases or decreases? Assuming that: A fluid exerts pressure in all directions, but the pressure is greater at greater depth.
(Answer)
increases