Periodic Table

Front

What are Physical Changes?

Back

Physical changes are changes that affect one or more physical properties of a substance without altering its chemical composition. Examples include crushing, cutting, melting, and boiling.

Front

What are Chemical Changes?

Back

Chemical changes are changes that result in the formation of new chemical substances. Examples include rusting of iron and the reaction between vinegar and baking soda.

Front

What is the Law of Conservation of Mass?

Back

The law of conservation of mass states that matter cannot be created or destroyed in a closed system during a chemical reaction.

Front

What is a Mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Examples include air and salad.

Front

What is a Compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).

Front

What is an Element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H) and oxygen (O).

Front

What are Physical Properties?

Back

Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, melting point, and density.

Front

What are Chemical Properties?

Back

Chemical properties are characteristics that describe a substance's ability to undergo chemical changes. Examples include reactivity with acids and flammability.

Front

What is an example of a Physical Change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a Chemical Change?

Back

An example of a chemical change is the rusting of iron.