Chemical Reactions

Front

What is a chemical reaction?

Back

A change in matter when the molecules rearrange to make new molecules.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat or light.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs energy, causing the surroundings to become colder.

Front

What happens during photosynthesis?

Back

Photosynthesis is a chemical reaction where plants convert sunlight, carbon dioxide, and water into glucose and oxygen, rearranging the atoms of the molecules.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change alters the form or appearance without changing the substance.

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 are reactants in a chemical reaction?

Back

Substances that undergo a change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed in the process.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.