Chemistry

Front

What is a chemical reaction?

Back

A process where substances (reactants) change into different substances (products) with different properties.

Front

What are reactants in a chemical reaction?

Back

The starting substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

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 an example of a physical change?

Back

Dissolving sugar in water.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is combustion?

Back

A chemical reaction that occurs when a substance reacts with oxygen, producing heat and light.

Front

What is an acid?

Back

A substance that donates protons (H+) in a chemical reaction and has a pH less than 7.

Front

What is a base?

Back

A substance that accepts protons (H+) in a chemical reaction and has a pH greater than 7.