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