Use the words from the drop down list to complete the sentences below.
A __________ is something scientists make to answer questions about the real world. These models make it __________ to see how atoms and molecules are arranged. Scientists often use models to show things that are too __________, or even too large, to see all around us.
__________ - Tiny piece of matter that is too small to see.
__________ - A group of atoms joined together in a particular way.
Atoms are __________ than molecules.