Chemical Vs Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of one or more new substances.

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

Give an example of a chemical change.

Back

Burning wood, rusting of iron, and cooking food are all examples of chemical changes.

Front

Give an example of a physical change.

Back

Melting ice, dissolving sugar in water, and bending a paperclip are examples of physical changes.

Front

What indicates that a chemical reaction has occurred?

Back

The formation of a gas, change in color, or production of heat are indicators of a chemical reaction.

Front

What is the best definition of a chemical reaction?

Back

A change in matter that produces one or more new substances.

Front

What happens to molecules during a chemical change?

Back

During a chemical change, the bonds between molecules are broken and new bonds are formed, resulting in new substances.

Front

What happens to molecules during a physical change?

Back

During a physical change, the arrangement of molecules may change, but their chemical structure remains the same.

Front

Is rusting a chemical or physical change?

Back

Rusting is a chemical change because it results in the formation of a new substance (rust).

Front

Is melting ice a chemical or physical change?

Back

Melting ice is a physical change because it changes the state of water from solid to liquid without altering its chemical composition.