2020م - 1444هـ




A Story of Two Substances: Introducing Chemistry

What is Chemistry?

Chemistry is the scientific study of the composition and properties of matter.

Types of Substances

A substance is a kind of matter with uniform composition and properties. It can be classified into natural

and synthetic substances.

Type of Substance Natural Substance Synthetic Substance

Example of Substance ozone (O3



) chlorofluorocarbon (CFC)

Origin produced in Earth’s stratosphere produced in laboratory

Uses



shields Earth from the Sun’s harmful



radiation



used in aerosol sprays, foam food

packaging, coolant for air-conditioners



and refrigerators