1. What is Chemistry?

2. How Chemistry Came to be?

3. Famous people of the Chemistry World

4. Matter: anything that has mass and takes up space
What is Matter?
Matter: anything that has mass and takes up space
Mass – the amount of matter in something
Volume – the amount of space something occupies

5. Which of the following is matter?
A car?
A box?
You?

6. Property: a characteristic of a substance that can be observed
What is a property?
Property: a characteristic of a substance that can be observed

7. Physical Property
Physical property: a property that can be observed without changing the identity of the substance.
Examples:
Luster: Does a ring shine/glisten?
malleability: the ability to be hammered into a thin sheet
ductility: the ability to be stretched into a wire
melting point
boiling point
density
solubility
specific heat

8. Special Physical Properties
Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure
WATER = 0oC
Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure
water = 100oC

9. Chemical Property

10. What is a Pure Substance?
A sample of matter that has definite chemical and physical properties

11. Examples of Pure Substances

12. What is a mixture?
Combination of two or more pure substances that are NOT chemically combined
Substances are held together by physical forces, not chemical
No chemical change takes place
Each item keeps its properties in the mixture
Can be separated physically

13. 2 Types of Mixtures Homogeneous Mixtures Heterogeneous Mixtures
Molecules are mixed up in an even distribution
Solutions are mixtures that appear to be in a single substance
Heterogeneous Mixtures
Molecules are NOT mixed up in an even distribution
Parts can be filtered out of the mixture

14. Examples of Homogeneous Mixtures
Sugar water
Lemonade
Kool-Aid
Soda
Air

15. Examples of Heterogeneous Mixtures
Snow globe
Sand in a bucket of water
Muddy water
Italian Salad Dressing

16. STC LESSON 1: The Nature of Matter
OBJECTIVES:
Discuss your understanding of the terms pure substance and mixture.
Observe matter in the form of pure substances and mixtures
Use your own words and ideas to explain your observations
NOTE:
**MAKE SURE YOU READ ALL INSTRUCTIONS AND FOLLOW ALL PROCEDURES EXACTLY THROUGHOUT THE LESSON**
WE WILL WALK THROUGH LESSON 1.1 TOGETHER THIS TIME!!!

17. What is an Element?
Pure substances that cannot be separated into simpler substances
Elements are the simplest substances
All the elements on earth can be found on the Periodic Table
Examples: Oxygen (O), Carbon (C), Hydrogen (H), Nitrogen (N)

18. What is a Molecule?
Composed of two or more elements that are joined by a chemical bond.
Elements can be the same: Ex: H2, O2, N2
Elements can be different: Ex: C6H12O6, H2O

19. What is a Compound?
Pure substance composed of two or more DIFFERENT elements joined by chemical bonds
Can be only separated by chemical means, not physically
Have their own physical and chemical properties
Examples:
H20 ---water
NaCl ----salt
NH3 ---ammonia
TiO—white out

20. What is a Solution? - Solute: Substance being dissolved
- Solvent: Substance the solute is dissolved in

21. STC LESSON 2: Pure Substance or Mixture?
OBJECTIVES:
Discuss your understanding of the terms “Pure Substance”.
Discuss how you distinguish between pure substances and mixtures.
Use your own techniques to discover whether several samples of matter are pure substances or mixtures
NOTE:
**MAKE SURE YOU READ ALL INSTRUCTIONS AND FOLLOW ALL PROCEDURES EXACTLY THROUGHOUT THE LESSON**