6th Grade 6.5C Evidence of Chemical Change

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances with different properties.

Front

What is evidence of a chemical change?

Back

Indicators that a chemical change has occurred, such as color change, gas production, or formation of a precipitate.

Front

What happens to an apple or potato when it turns brown?

Back

This is evidence of a chemical change due to oxidation.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is an example of a physical change?

Back

Evaporating water from salt water.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is a color change in a chemical reaction?

Back

A change in color that indicates a chemical reaction has taken place.

Front

What does it mean to release heat energy in a chemical reaction?

Back

It indicates that the reaction is exothermic, meaning it releases energy in the form of heat.

Front

What is the significance of forming new substances in a chemical reaction?

Back

It is a key characteristic that distinguishes chemical changes from physical changes.

Front

What is an example of a chemical reaction?

Back

Burning sugar, which gives off an odor and changes color.