Word bank: carbon, carbohydrate (2), cellulose, glycogen, hydrogen, lipid, molecule,
monosaccharide, nucleic acid, oxygen, polysaccharide, protein, starch
hydrogen
atom
water molecule h2o
_hydrogen
атом
atoms are tiny, tiny building blocks. when you put two or
more together, you get a
_. that might not
seem very big, either, but it's all relative. some molecules are
"macromolecules." made up of thousands of atoms, they are
comparatively large. the four major classes of molecules
found in living things are giants in the microscopic world.
oxygen atom
oxygen atoms
oxygen
molecule 02
each have different jobs that keep organisms performing
their life functions.