Does every change from one form of energy to another form?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

What are fructose and glucose an example of?

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.