Physical/Chemical Properties, Changes and Reactions

Front

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

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances with different chemical properties.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Rusting of iron is an example of a chemical change.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that is consumed during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What are some indicators that a chemical change has occurred?

Back

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

Front

Is the formation of the Grand Canyon a physical or chemical change?

Back

The formation of the Grand Canyon is considered a physical change.

Front

What is an example of a chemical reaction that produces gas?

Back

The reaction of vinegar and baking soda produces carbon dioxide gas.

Front

What is meant by 'change in temperature' as a clue for a chemical change?

Back

A change in temperature indicates that energy is either absorbed or released during a chemical reaction, suggesting a chemical change has occurred.