Question

vocabulary: atom, atomic number, electron, electron dot diagram, element, energy level, ion, isotope, mass number, neutron, nucleus, periodic table, proton, radioactive, valence electrons
prior knowledge questions (do these before using the gizmo.)

1. what are some of the different substances that make up a pizza? ____

____

1. what substances make up water? ____
2. what substances make up an iron pot? ____

Explanation:

1. A pizza contains substances like flour (carbon - based compounds), cheese (proteins, fats), tomato sauce (water, acids, sugars, etc.), and toppings which can include meats (proteins, fats), vegetables (carbohydrates, vitamins, etc.).
2. Water is made up of hydrogen and oxygen, chemically combined in a 2:1 ratio as $H_2O$.
3. An iron pot is mainly made of iron metal.

Answer:

1. Flour, cheese, tomato sauce, meats, vegetables.
2. Hydrogen and oxygen.
3. Iron.