Question

determine which type of change each statement represents. physical change chemical change grind coffee beans aluminum combining with oxygen to form aluminum oxide crushing an aluminum can recycling used aluminum cans to make new ones copper turns a greenish color sliver spoon tarnishes burning wood freezing water

Explanation:

Physical changes do not change the chemical composition of a substance, only its physical form. Chemical changes result in the formation of new substances with different chemical properties. Grinding coffee beans and crushing an aluminum can are physical changes as they only change the physical state. Recycling used aluminum cans to make new ones and freezing water are also physical changes. Aluminum combining with oxygen to form aluminum oxide, copper turning greenish (due to oxidation), silver spoon tarnishing (a chemical reaction with sulfur - containing substances in air), and burning wood (combustion reaction) are chemical changes.

Answer:

grind coffee beans: physical change
aluminum combining with oxygen to form aluminum oxide: chemical change
crushing an aluminum can: physical change
recycling used aluminum cans to make new ones: physical change
copper turns a greenish color: chemical change
silver spoon tarnishes: chemical change
burning wood: chemical change
freezing water: physical change