Physical Science Review

A process where substances (reactants) are transformed into new substances (products) with different properties.

In a closed system, the total mass of reactants equals the total mass of products; mass is neither created nor destroyed.

A change that affects one or more physical properties of a substance without altering its chemical composition.

A change that results in the formation of new chemical substances.

A pure substance that cannot be broken down into simpler substances by chemical means.

Materials that allow the flow of electric current or heat; examples include metals like copper.

An element that has properties of both metals and nonmetals; examples include silicon.

Elements that are typically poor conductors of heat and electricity; examples include oxygen and carbon.

A physical change where a liquid turns into vapor when heated to its boiling point.

A chemical change that occurs when iron reacts with oxygen and moisture to form iron oxide.