What makes a question able to be
answered by science?

Testable questions can be answered through investigations that involve experiments, observations, or surveys. Testable questions are answered by collecting and analyzing evidence that is measurable. Testable questions relate to scientific ideas rather than personal preference or moral values.

Explanation:

hope this helps

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).