Classification of Matter Game

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, such as heat or light.

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, such as melting or boiling.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio, such as water (H2O) or carbon dioxide (CO2).

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means, such as saltwater.

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes color change, gas production, formation of a precipitate, and release of heat or light.

Front

What happens during the burning of magnesium?

Back

When magnesium burns, it undergoes a chemical change, producing magnesium oxide and releasing heat and light.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water; the substance remains H2O but changes state.

Front

What is the significance of a change in temperature during a reaction?

Back

A change in temperature can indicate a chemical change, as it often involves the release or absorption of energy.

Front

What is a phase change?

Back

A phase change is a transition of matter from one state to another, such as solid to liquid (melting) or liquid to gas (evaporation).