1. Welcome ! C APT Physical Science

2. What is an ACID? An ACID is a Compound that has Hydrogen at the Beginning of its formula HCl H 2 SO 4 HNO 3 What's a BASE ? - Opposite of an ACID - Used to Neutralize and ACID - Formula ends with -OH Examples of Acids: Here’s what you should know about acids: Can burn your skin React with metals Can damage building materials

3. How do we Measure ACID or BASE ? pH Scale

4. ACIDS vs. BASES Baking Soda Alka-Seltzer Vinegar Calcium Carbonate (TUMS, Rolaids) Orange Juice Lemon Juice Let's Sort These:

5. ACIDS vs. BASES Baking Soda Alka-Seltzer Vinegar Calcium Carbonate (TUMS, Rolaids) Orange Juice Lemon Juice Let's Sort These: What is ACID RAIN ?

6. ACID Rain When pollutants combine with water they make acid rain, rain that is acidic (pH<5.5)

7. What are some environmental concerns with Acid Rain?

8. Acid Rain Lab Lab Discussion & Analysis How is the type of building material affected by acid rain? What is the Independent Variable? What is the Dependent Variable? What should be Controlled in this experiment?

9. Acid / Base Review TermDefinition Begins with an H BASE 0-14 (7 is neutral) STRONG ACIDS Rain w/ pH <5.5 SO, NO pollutants

10. Acid / Base Review TermDefinition ACIDBegins with -H BASEEnds with -OH pH SCALE0-14 (7 is neutral) STRONG ACIDSpH 0-3 ACID RAINRain w/ pH <5.5 SO, NO POLLUTANTSCombines w/ H 2 O

11. Polymers "Plastics" What are some Advantages of using Polymers? Strong Light Weight Flexible Lots of variety TENSILE STRENGTH

12. Cross-Linking Cross-Linking increases the strength of the Polymer

13. Recycling Codes