Science Chemical Reactions

___________________ are the elements or compounds that are formed in a chemical
reaction.

• Polymers
• Bonds
• Reactants
• Products

What is a chemical formula?

• A mathematical equation based on atomic numbers
• A equation used to find an element's valence
• Uses chemical symbols to represent the atoms of elements and their ratios in a chem. compound

_______________ can speed up the rate of reactions and/or lower the amount of energy needed for
the reaction to take place.

• Carbohydrates
• Fuel source
• Chemical
• Catalyst

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Element or compound?
H₂O

• element
• compound

Compounds break down into simpler substances in this type of reaction.....

• Double Replacement
• Single Replacement
• Synthesis
• Decomposition

The energy needed to start a chemical reaction is the _____________________.

• Activation Energy
• Products
• Reactants
• Enzymes

_{Name this reaction, CO2} + H₂O --> H₂CO₃ 

• Decomposition
• Single Replacement
• Synthesis
• Combustion

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Is melting an object technically known as a chemical reaction? 

• maybe?
• Yes
• No