Chemical Changes Review

The formation of a solid during a chemical reaction.

• chemical reaction
• combustion
• precipitate
• phase change

A chemical reaction involving oxygen that usually gives off heat and/or light.

• chemical reaction
• combustion
• precipitate
• phase change

Another name for a state of matter change such as a solid becoming a liquid

• chemical reaction
• combustion
• precipitate
• phase change

when two or more molecules interact and change into a new substance.

• chemical reaction
• physical change
• precipitate
• phase change

a change in form or appearance of a substance that does not result in a new substance

• chemical reaction
• physical change
• precipitate
• phase change

Check TWO that are a chemical change

• Wood burning
• Ice melting
• Bread rising

Check TWO that are a chemical change

• Tearing paper
• Iron rusting
• Silver tarnishing

Check TWO that are a physical change

• Tearing paper
• Food digesting
• Chopping vegetable
• Leaves changing color

Which of the following is an example of a chemical change occurring? Choose TWO correct answers.

• chopping the pecans
• the golden-brown color of the top of the cake
• whipping the eggs until fluffy
• melting the butter
• baking the cake at a high temperature

Which of the following is evidence of a chemical reaction occurring during the process of baking a cake? Choose TWO correct answers.

• The mixed ingredients changed to a new substance when baked.
• The butter changed from a solid to a liquid.
• The texture of the eggs changed from a gel-like substance to a fluffy substance.
• The top of the cake changed to a new color.
• The shape of the pecans changed after they were chopped.