Chemical vs. Physical Changes_GG Science

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change; the ice changes from solid to liquid but remains water.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change; it transforms into ash and gases.

Front

What happens to the gas during a physical change?

Back

The gas remains the same before and after the change, indicating a physical change.

Front

What is the flame test used for?

Back

The flame test is used to identify the presence of certain metal ions based on the color of the flame produced.

Front

What indicates a chemical change when something burns?

Back

The production of heat and light, along with the formation of new substances, indicates a chemical change.

Front

What is an indicator of hydrogen gas during a flame test?

Back

A characteristic 'pop' sound indicates the presence of hydrogen gas during a flame test.

Front

Is the spoiling of milk a physical or chemical change?

Back

The spoiling of milk is a chemical change due to the formation of new substances.

Front

What is the difference between a physical and chemical change?

Back

A physical change does not alter the chemical composition, while a chemical change results in new substances.