Physical Science Review

Front

What is a chemical reaction?

Back

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

Front

What is the law of conservation of mass?

Back

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

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

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

Front

What is an element?

Back

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

Front

What are conductors?

Back

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

Front

What is a metalloid?

Back

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

Front

What is a nonmetal?

Back

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

Front

What is boiling?

Back

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

Front

What is rusting?

Back

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