Chemical and Physical Change

Front

What indicates a chemical reaction occurred?

Back

Heat or light is released, gas (bubbles) produced, color change, all of the above.

Front

Where are the reactants located in a chemical equation?

Back

On the left side of the chemical equation.

Front

What is an example of a chemical change?

Back

Burning a piece of paper.

Front

Which example best illustrates a physical change?

Back

An ice cube melting.

Front

What is tearing paper into small pieces an example of?

Back

A physical change.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

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

Dissolving sugar in water.

Front

What happens to the mass of substances during a chemical change?

Back

The mass is conserved; it remains the same before and after the reaction.

Front

What is an indicator of a chemical change?

Back

Production of gas, change in color, formation of a precipitate, or release of energy.