7.1 OpenSciEd

Front

What is an open system?

Back

An open system is a system where matter and energy can flow into and out of it.

Front

What is a closed system?

Back

A closed system is a system where matter cannot enter or leave, but energy can flow in and out.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, atoms are rearranged to form new substances.

Front

What is a molecular formula?

Back

A molecular formula shows the number and type of atoms in a molecule, e.g., H₂O for water.

Front

What is carbon dioxide?

Back

Carbon dioxide is a colorless gas produced by burning carbon and organic compounds and by respiration.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction that undergo change.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.