Which indicator would tell scientists the most about future climate change

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

What will most likely happen when two bromine atoms bond together?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?