17. when energy changes from one form to another, it is known as:
a. energy transfer
b. energy transformation
c. energy exchange
d. energy transmit

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

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.