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?

1. what substances make up an iron pot?

Explanation:

1. A pizza contains substances like flour (carbohydrates), cheese (proteins, fats), tomato sauce (tomatoes - mainly water, sugars, acids), and various toppings such as meats (proteins, fats), vegetables (carbohydrates, vitamins, minerals).
2. Water is made up of hydrogen and oxygen. Each water molecule is composed of two hydrogen atoms and one oxygen atom, with the chemical formula $H_2O$.
3. An iron pot is mainly made of iron metal. Sometimes, other elements might be present as alloys to improve properties like carbon to make cast - iron stronger.

Answer:

1. Flour, cheese, tomato sauce, meats, vegetables.
2. Hydrogen and oxygen.
3. Iron (and sometimes other alloying elements like carbon).