If a hydrometer in an aquarium shows a density reading of 1.025 g/mL with the water temperature at 20˚C, a) what is the salinity of the water?
b) would the water be described as brackish water, average seawater, or hypersaline water?

Would really appreciate it, i have an idea but not completely sure

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.