3. An atom is
so how do scientists know about them?
Click on Strange
Matter and zoom in to see the atoms in a soda can.
Click on Learn More
About This Small World.
You can use a
virtual electron microscope by
4. If everything is made of
atoms, why doesn't everything look the same?
There are different
kinds of atoms. When 2 or more atoms
combine and join together they create a
molecule. Molecules can be made from the same
kind of atoms or combinations of different atoms.
are made from atoms, but they look different because of the way they are
Look at the pictures
below. These are models of different molecules. They all are
made of atoms, but they are put together differently.
5. Chemical Changes and Atoms
You can cause
molecules to change the way they are put together by making a
you burn a log in the fireplace,
the molecules of the log