chemical reactions

the starting materials in a chemical reaction

• Products

• Reactants

• Starters

• Enders

a substance that is formed as the result of a chemical reaction

• Product 

• Reactant

• Starters

• Enders

tells us the number of atoms of each element in a compound

• Coeffecient

• Exponent

• Chemical Formula

• Calculator

Provides evidence that a chemical reaction has occurred. 

• dissolving 

• melting

• formation of a gas

• bending

Which of the following is not evidence of a chemical reaction?

• Formation of a precipitate

• Production of gas

• Change in temperature

• Change in state of matter

A chemical reaction is...

• when a substance is mixed with another substance

• when a substance undergoes a change to form a new substance

• when a substance is dissolved into another substance

• when a substance is heated or exposed to another substance

What type of changes the appearance change but the substance is the same.

• Physical

• Chemical

Identify the following process: We light a matchstick.

• Physical change

• Chemical change

Identify the following process: The food and the air react.

• Physical change

• Chemical change

What is this ?

• a chemical reaction

• a mathematical equation

• a chemical equation