Unit 2 Pre Assessment-Chemical Reactions

What happens in all chemical changes

answer choices

• A Change in state of matter

• A new substance is formed

• Bubble are produced

• An explosion

Is wood burning a physical or chemical change

• Physical

• Chemical

Is making orange juice a physical or chemical change?

• Physical

• Chemical

The Law of Conservation of Mass tells us that matter cannot____

• Change color

• Change it's state of matter

• Be created or destroyed

• Change temperature

Which of the following IS a clue that a chemical change has occurred?

• State of matter change

• Size change

• Change in temperature

How many atoms of carbon (C) are in C6H12O6?

• 3

• 6

• 12

• 24

The substances listed on the right side of a chemical equation are the _______

• Yields

• Reactants

• Products

• Precipitates

Which of the following is not a compound

• HCL

• CL

• NaCl

• CO2

What cannot be broken down into other substances?

• Compound

• Mixture

• Solids

• Elements

Is the formation of rust a chemical or physical change.

• Chemical

• Physical