Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where one or more new substances are created, involving a rearrangement of atoms.

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

An example of a chemical change is the reaction between baking soda and vinegar, which produces carbon dioxide.

Front

What happens to the color of copper when it undergoes a chemical change?

Back

The copper roof changes color due to the formation of new substances, such as copper carbonate.

Front

What is a key characteristic of all chemical changes?

Back

In all chemical changes, a new substance is formed.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.

Front

What is an example of a physical change?

Back

An example of a physical change is a glass bottle that is shattered.

Front

What are some indicators of a chemical change?

Back

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

Front

Can a chemical change be reversed?

Back

Most chemical changes are not easily reversible, unlike physical changes which can often be reversed.

Front

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

Back

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