1. Chapter 1 Chemistry and Measurements
1.1
Chemistry and Chemicals

2. 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.

3. 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.

4. 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

5. 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.

6. 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.

7. Chemicals Commonly Used in Toothpaste

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

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

10. 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.