1. SC300: Big Ideas in Science: From Methods to Mutation Welcome to Unit 3 Seminar This week will discuss electromagnetic waves ▫Come help explain to Grandma Pauline who just won a microwave oven the differences between electromagnetic waves! ▫I will be available at AIM:KaplanHallPogar before and throughout the seminar if you have any questions or issues. We will begin promptly at 7:00pmEST

2. Looking ahead Unit 3 DB ▫Two threads ▫You are required to post to both Unit 4 Heads Up ▫Group Work for discussion board ▫Make sure to check in your classroom for your assignments

3. 2 kinds of electromagnetic waves 1. Infrared/microwave waves  http://science.hq.nasa.gov/kids/imagers/ems/mi cro.html http://science.hq.nasa.gov/kids/imagers/ems/mi cro.html  2. http://science.hq.nasa.gov/kids/imagers/ems/ infrared.html http://science.hq.nasa.gov/kids/imagers/ems/ infrared.html 2. Visible light waves ▫http://science.hq.nasa.gov/kids/imagers/ems/vi sible.html http://science.hq.nasa.gov/kids/imagers/ems/vi sible.html

4. Field Trip! Light http://www.youtube.com/watch?v=xZ6XUk7QL bUhttp://www.youtube.com/watch?v=xZ6XUk7QL bU

5. Electromagnetic waves Visible light and heat ▫Two aspects of the same thing Radio waves, visible light, nuclear radiation, and X-rays

6. Electromagnetic waves The difference among all of them is their energy Example ▫Move from left to right ▫Notice that radio waves have the least energy ▫What sources have the most energy?

7. Grandma Pauline has just won a microwave oven… "If I stand too close, I'll get radiated!" Is she right?

8. Help Grandma Pauline… According to the picture why is a cat’s nose always cold? Infrared Image

9. Infrared image of human

10. KROQ- FM on her new oven Grandma Pauline wants to listen to radio waves on her microwave oven Radio waves are Electromagnetic waves too Can she?