Grab binders & handouts, begin the Do Now

1. Grab binders & handouts, begin the Do Now 3/8 DO NOW If the mayor approved the plans to build a nuclear power plant next to our school would you support his decision or protest? Why? What do you think it means to be “energy efficient”? Grab your returned work and organize your binder.

2. Complete Exit Ticket 6 silently and independently. • At the bottom of your Exit Ticket Answer the following questions: • What are some effects of being exposed to radiation? • Would you support the use of Nuclear Power? Why or why not? • When finished with your exit ticket submit it, as well as the stations work, to the class bucket and put away your binder. Exit Ticket 6

4. Energy Efficiency:How can I compare the energy efficiency of cars to determine which one I want? *Which car is more energy efficient?

5. What does it mean to be Energy Efficient? • Low input, high output! High input : low out put  inefficient Input = output  nonproductive Low input : high output  efficient

6. Examples of POOR Energy Efficiency • Escalade Gas Mileage • Use 30 gallons of gas only to travel a total of 12 miles!...that’s a lot of gas for a little bit of driving • Debt • Spending $2500 a week when you only make $1000 in one week

7. Examples of GOOD Energy Efficiency • Prius Gas Mileage • Use 13 gallons of gas to travel a total of 32 miles…that’s a long distance for a little amount of gas (and money for gas) • Groupon! (store sales) • Pay less than the normal amount, but still get the normal service or goods • Sleeping • Requires no energy on our end to sleep, but restores our energy by the time we wake up!

8. Examples of Neither Energy Efficient nor Inefficient • Healthy Diet • Calories in = Calories out  neither energy efficient or energy inefficient

9. Energy Efficiency of FoodLab Safety • NO eating the food • NO playing with the lighters • NO horseplay, stay at your station • NO sitting at the lab bench • NO warnings, immediate removal

10. Units & Calculations • Mass  grams (g) • Volume  milliliters (mL) _______________________________________ • Overall change in temperature: Final Temperature – Initial Temperature • Calculating ratio of temperature to mass” Overall Temperature Change (oC)/mass of food item (g)

11. What Does the Ratio Tell Us? • Miles per hour (m/hr) - miles driven in 1 hour • Temperature change per gram (⁰C/g)

12. Lab Clean Up • Place all food debris into the Ziploc trash bag at your lab bench • Sweep up any ash and add to the Ziploc trash bag • Burn off any food remnants from the food apparatus using the lighter. • Empty all water down the sink

14. What makes Nuclear Power so energy efficient? • Fission – The splitting of an atom into 2 smaller parts Creates a chain reaction (a series of reactions that each initiate the next)…self sustaining

15. Exit Ticket 7 Answer the following questions on a separate sheet of paper. When finished submit to the class bucket! • In your own words, describe what it means to be energy efficient? • Which food, the Dorito or the Marshmallow, was the most energy efficient? Explain why. • Briefly explain why nuclear energy is energetically efficient.