7th Grade Practice Fall final

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat, causing the surrounding temperature to increase.

Front

What is a molecule?

Back

A group of atoms bonded together.

Front

What happens during a chemical reaction?

Back

Substances change into different substances.

Front

What are elements?

Back

Pure substances that cannot be broken down into simpler substances by chemical means.

Front

Give five examples of elements.

Back

Hydrogen, Oxygen, Gold, Silver, Iron.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products, involving the breaking and forming of bonds.

Front

What are the signs of a chemical reaction?

Back

Color change, temperature change, gas production, and formation of a precipitate.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it remains constant.

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product?

Back

A substance that is formed as a result of a chemical reaction.