1. Do Now 10/23
Do not pick up a pink sheet today. Just find your seat, get out your journal and a pencil.
You will have 3 minutes to ask questions before the test.

2. Do Now 10/24 1. What is the definition of Energy?
2. List as many forms of energy as you can.

3. At some point, the skater had the energy shown in this graph.
1. Describe his speed at that point. (choose one)
DO NOW 10/30
He is at his maximum speed
He is stopped
He is going his average speed
He is going slow
He is going fast
Sim demonstration: Open the simulation and explore the skateboarder’s behavior with no friction, but without displaying the bar graph during the demonstration.
Correct answers: A
Representative results from pre-general chemistry: 53-63% correct (next most popular was C between 25-30%)
2. Is this a system with or without friction? How do you know?

4. Do Now 10/25
The bar graph shows the energy of the skater. Where could she be on the track? Explain your thoughts A B C D E
Sim demonstration: Open the simulation and explore the skateboarder’s behavior with no friction, but without displaying the bar graph during the demonstration.
Correct answer: D
Representative results from pre-general chemistry: 62-69% correct (next most popular was C at 20-30%)
Follow-up discussion: Ask students how they determined their answer, and discuss conservation of mass. Ask students how they determined their answer, and discuss conservation of mass. It may also be worthwhile discussing points C vs. D and how the change in potential energy is related to height (depending on how many students vote C vs. D).

5. Do Now 10/26
A. Luis say that since both A and B are at the bottom of the hill, that their Kinetic Energies will be equal because you have the highest amount of kinetic energy at the bottom of the hill.
B. James says that A and B will NOT be equal because there is a different amount of potential energy at point A then at point B.
C. Marcy says that A and B will not have equal kinetic energies. Because you did not start with the same total energy.
Who is correct, explain. B A

6. Mass - Energy – Law of Conservation of Energy
LT: To describe energy changes in a frictionless system in graphical and word form
Vocab:
Mass -
energy-
Matter-
Work-
Potential energy
Kinetic Energy
Define these words after reading the pages in the little blue book

7. -Energy skate park html 5
Energy – Law of Conservation of Energy
Go to phet.Colorado.edu
-Sims
-Physics
-Energy skate park html 5
Complete the blue sheet in your notebook.

8. Mini Posters (Model) Directions
Complete all the equations on the front
Choose one of the situations.
Draw it on your poster
Make a mathematical model( equation with symbols and numbers)
a graphical model ( draw the graph –bar or line
a word model of the system ( explain what is happening in words)

9. The bar graph shows the energy of the skater
The bar graph shows the energy of the skater. Where could she be on the track? A B C D E
Sim demonstration: Open the simulation and explore the skateboarder’s behavior with no friction, but without displaying the bar graph during the demonstration.
Correct answer: D
Representative results from pre-general chemistry: 62-69% correct (next most popular was C at 20-30%)
Follow-up discussion: Ask students how they determined their answer, and discuss conservation of mass. Ask students how they determined their answer, and discuss conservation of mass. It may also be worthwhile discussing points C vs. D and how the change in potential energy is related to height (depending on how many students vote C vs. D).