Unit 5 Practice

Front

What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes.

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 happens to the mass of reactants and products in a chemical reaction?

Back

The mass of the reactants before the reaction is equal to the mass of the products after the reaction.

Front

What is an example of a Chemical Change?

Back

Baking soda reacting with vinegar to produce carbon dioxide.

Front

What is an example of a Physical Change?

Back

Melting ice into water.

Front

What is an Independent Variable in an experiment?

Back

The one factor that is changed on purpose to test its effect.

Front

What is a Dependent Variable in an experiment?

Back

The factor that is measured or observed in response to changes in the independent variable.

Front

What is a Control in an experiment?

Back

The standard to which the outcome of a test is compared; it remains constant.

Front

What is an example of a Chemical Change involving a candle?

Back

A candle burning, where wax is transformed into carbon dioxide and water.

Front

What is oxidation?

Back

A chemical reaction where a substance loses electrons, often resulting in a change in color, like a copper penny turning green.