HELP PLEASE I NEED THE ANSWERS FAST (15 POINTS)

1. Which type of water is more dense, hot or cold? Explain why.

2. Which type of water is more dense, warm fresh water or cold salty water? Explain why.

3. Explain the relationship between temperature and density.

4. Explain the relationship between salinity and density.

1) Cold water is more dense and will sink in room temperature water.

2) Cold salty water is denser than warm freshwater.

3) Temperature is the measure of heat. Density is the measure of how closely any given entity is packed or it is the ratio of the mass of the entity to its volume.

4) Salinity and density share a positive relationship. As density increases, the amount of salt in water-also known as salinity- increases.

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."