physical change and chemical 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.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

Front

True or false: A physical change can result in an entirely different substance.

Back

False

Front

Which of these is a result of a chemical change? A mixture, A solution, A new substance, Melting or freezing?

Back

A new substance

Front

True or false: Some physical changes involve chemical reactions.

Back

False

Front

True or false: Physical changes include changes in the state of matter.

Back

True

Front

What are examples of physical changes?

Back

Examples include melting, freezing, boiling, and dissolving.

Front

What are examples of chemical changes?

Back

Examples include rusting, burning, and digestion.

Front

What is the law of conservation of mass in relation to chemical changes?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their arrangement or state, but their chemical structure remains the same.