Does water volume increase or decrease when it freezes?

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

How do you date a sample of rock that you suspect as being one of the earliest on earth

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?