A change in the size, shape, or state of matter.

• chemical change
• physical change
• chemical reaction
• electron change

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• A metal gate changes color as it rusts

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Silver is a shiny metal that tarnishes (turns grey) when exposed to air, and weighs 10.49 g. Which is the chemical property?

• shiny
• Tarnishes
• 10.49 g

Baking a cake is an example of a chemical change that requires/takes in thermal energy. 

• True
• False

Salt dissolves in water.

• Physical change
• Chemical change

Hydrochloric acid reacts with magnesium to produce hydrogen gas

• Physical change
• Chemical change

A sugar cube is ground up. 

• physical change
• chemical change

Liquid water is heated and changed to a gas (water vapor).

• physical change
• chemical change

Food is digested in the stomach. 

• physical change
• chemical change