BY - SYDNEY WESTPHAL

PURE SUBSTANCES THAT ARE COMPOSED OF THE SAME ATOMS

HYDROGEN, OXYGEN, NITROGEN, CARBON, AND SODIUM

2 OR MORE ELEMENTS CHEMICALLY COMBINED

H2O, Fe2O3, H2SO4, AND 2NO2

Substances that have come together but have not made a new substance

Salad, air, chex mix, soil, and mixed vegetables

Homogeneous and heterogeneous

Substance is mixed well enough that we cant see each component

When each component can be seen in the mixture

In the Earth's crust