Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where a substance transforms into a different substance with new chemical properties, often involving a chemical reaction.

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 happens during a chemical reaction?

Back

During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it produces ash, smoke, and gases, which are different substances.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid but remains water.

Front

What indicates a chemical change has occurred?

Back

Signs of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in new substances being formed, while a physical change does not change the chemical identity of the substance.

Front

What is a precipitate?

Back

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

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it remains constant.

Front

What is an example of a physical change involving state of matter?

Back

Boiling water is an example of a physical change where water changes from liquid to gas.