Chemical/Physical Change

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. Examples include changes in size, shape, or state of matter.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the chemical properties of the substance. Examples include burning, rusting, and cooking.

Front

Is juicing a lemon a chemical or physical change?

Back

Juicing a lemon is a physical change because it alters the form of the lemon but does not change its chemical composition.

Front

Is roasting marshmallows a chemical or physical change?

Back

Roasting marshmallows is a chemical change because it involves a chemical reaction that transforms the marshmallow into a different substance.

Front

Is crushing a soda can a chemical or physical change?

Back

Crushing a soda can is a physical change because it changes the shape and size of the can without altering its chemical composition.

Front

Is slicing a cake a chemical or physical change?

Back

Slicing a cake is a physical change because it changes the shape of the cake but does not change its chemical properties.

Front

Is water evaporating a chemical or physical change?

Back

Water evaporating is a physical change because it changes from liquid to gas without changing its chemical composition.

Front

What are some examples of physical changes?

Back

Examples of physical changes include melting ice, boiling water, dissolving sugar in water, and breaking glass.

Front

What are some examples of chemical changes?

Back

Examples of chemical changes include burning wood, rusting iron, baking a cake, and souring milk.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules may change their arrangement or state (solid, liquid, gas) but remain the same substance.