1. The Science of Chemistry Chapter 1
1.1 – What is Chemistry?

2. What do you think chemistry is?
What is Chemistry?
What do you think chemistry is?
Chemical – any substance with a definite composition
Some natural and some artificial
Chemistry is defined

3. Chemicals Participate In…
Chemical Reaction – the process by which 1 or more substances change to produce 1 or more different substances
Top 8 produced chemicals

4. Chemicals exist in a physical state
What are the 3 physical states of matter?
States of Matter – the physical forms of matter which are solid, liquid, gas, and plasma
What are the differences between them?

5. Changes of Matter
Physical Change – the identity of the substance does not change
~ it is still the same compound
~ tearing paper
~ change of state
~ sugar mixing with tea

6. Changes of Matter
Chemical Change – identity of substance changes and a new substance is formed
Fe + O2  FeO Iron Rusting
A leaf decaying

7. Reactions
Reactant – a substance or molecule that participates in a chemical reaction
Product – a substance that is formed during a chemical reaction
 is a yield sign and it indicates the direction of a rxn

8. Evidence of a Chemical Change
Evolution of gas
Formation of precipitate
Evolution or absorption of Energy
Color change in reaction system

9. Questions
Describe the motion of particles in the 3 common states of matter.
Explain why gasses and liquids do not have permanent shapes.

10. Assignment
Copy the vocabulary words and their definitions for chapter 1 in your notebook.