Physical and Chemical Reactions

matter can not be created or destroyed

matter can be created and destroyed

matter can be changed and created

matter can be rearranged and destroyed

odor produced

change in state of matter

light

temperature change

Crushing a can

chopping wood

mixing sugar into water

shredding paper

A chemical change has occurred in model B. In the second cup you can see that the molecules have just rearranged.

A chemical change has occurred in model B. In the second cup you can see a bond (black line) has formed between the green and blue molecule and new light pink/light blue molecules have also formed.

A physical change has occurred in model B. In the second cup you can see that the molecules have just rearranged.

A physical change has occurred in model B. In the second cup you can see a bond (black line) has formed between the green and blue molecule and new light pink/light blue molecules have also formed.

Digesting food

cooking an egg

Rotting Banana

Cutting an orange

change in state of matter

change in size

change in shape

temperature change

The mass of the products stays the same during a chemical reaction

The mass of the products is always twice the mass of the reactants

The mass of the reactants stays the same during a chemical reaction

The type and number of atoms in the reactants equals the type and number of atoms in the products

The mass of the products stays the same during a chemical reaction

The mass of the products is always twice the mass of the reactants

The mass of the reactants stays the same during a chemical reaction

The type and number of atoms in the reactants equals the type and number of atoms in the products

The mass of the products stays the same during a chemical reaction

The mass of the products is always twice the mass of the reactants

The mass of the reactants stays the same during a chemical reaction

The type and number of atoms in the reactants equals the type and number of atoms in the products

The atoms of the reactants always stay together to form the products

The atoms of the reactants unbond, rearrange, and then rebond to form the products

New atoms are formed which combine to make the products

Some atoms disappear while others multiply to form the products

Chemicals are used

Molecules do not physically touch

A new substance is formed and in a physical change no new substance is formed

The change can be seen but in a physical change it cannot