Physical & Chemical Changes/Endo & Exo Flashcard

Front

What is a chemical change?

Back

A process where one or more substances are transformed into new substances with different properties.

Front

What is a physical change?

Back

A change that occurs without altering the chemical composition of a substance; no new substances are formed.

Front

What evidence indicates a chemical change has occurred?

Back

The production of a new substance.

Front

What happens to energy in an endothermic reaction?

Back

Energy is taken in.

Front

What happens to energy in an exothermic reaction?

Back

Energy is given off.

Front

What is an example of a chemical change?

Back

Baking soda reacting with vinegar to produce carbon dioxide.

Front

What is an example of a physical change?

Back

Melting ice into water.

Front

What are the signs of a chemical reaction?

Back

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

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that undergo a chemical change, while products are the new substances formed.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.