Chapter 1 Chemistry and Measurements 1.1 Chemistry and Chemicals

What Is Chemistry? Chemistry is the study of composition, structure, properties, and reactions of matter happens all around you everyday Antacid tablets undergo a chemical reaction when dropped in water.

Chemistry Matter is another word for all substances that make up our world. Antacid tablets are matter. Water is matter. Glass is matter. Air is matter.

Branches of Chemistry The field of chemistry is divided into branches, such as organic chemistry, the study of substances that contain carbon inorganic chemistry, the study of all substances except those that contain carbon general chemistry, the study of the composition, properties and reactions of matter

Chemistry + Other Sciences Chemistry is often combined with other sciences: Geology + Chemistry = Geochemistry Biology + Chemistry = Biochemistry Physical Science + Chemistry = Physical Chemistry Biochemists analyze lab samples.

Chemicals Chemicals are substances that have the same composition and properties wherever found often substances made by chemists that you use everyday Toothpaste is a combination of chemicals.

Chemicals Commonly Used in Toothpaste

Chemicals Used When Cooking Many substances found in the kitchen are obtained using chemical reactions.

Learning Check Which of the following contains chemicals? A. sunlight B. fruit C. milk

Solution Which of the following contains chemicals? A. Sunlight is energy given off by the Sun and therefore does not contain chemicals. B. Fruit contains chemicals that have the same composition and properties wherever found. C. Milk contains chemicals that have the same composition and properties wherever found. Therefore, only B. fruit and C. milk contain chemicals.