1. Energy Study Slides

2. Extra Credit!
BrainPop! User = Windy1 Password = Ridge Forms of Energy Kinetic Energy Potential Energy Gotta get a 100%!!! me results (take a screen shot for backup) OR just show me the screen shot, or app score…

3. Tips!
KNOW ALL DEFINITIONS AND REAL LIFE EXAMPLES OF EACH OF THE 6 TYPES OF ENERGY
Review, USE the resources listed on your study guide!
BE ABLE TO ANALYZE DATA and A GRAPH in order to write a conclusion. *includes variables (review)
Honors—You’ll need to be able to calculate efficiency (MS credit too) BUT you’ll also have to convert temp! Perhaps a bit of extra credit with converting KE and PE! I know we haven’t done much with it, but….

4. 1 Tally Questions
Sequential order…Person 1, 2, 3…. This order must be the same throughout the entire game. HOWEVER, everyone must be taking CORNELL notes on the slides…but only ONE person has the long board….official answer.

5. # 1 Define Energy The ability to do work or cause change
The transfer of work over time
How fast something moves
Anything that comes from the sun that causes eventual movement

6. # 1 Answer Define Energy The ability to do work or cause change *
The transfer or work over time
How fast something moves
Anything that comes from the sun that causes eventual movement

7. # 2 Which is NOT an example of Kinetic Energy?
A runner in the middle of a race
A car driving
A river flowing
A rock sitting at the top of a hill

8. # 2 Answer Which is NOT an example of Kinetic Energy?
A swimmer in the middle of a race
A car driving
A river flowing
A rock sitting at the top of a hill *
*Keep in mind, when you see potential and kinetic on their own, without one of the 6 types of energy with it, assume it is referring to mechanical energy

9. # 3 Which of the following is an example of ONLY Potential Energy?
Wind blowing a windmill
A runner on the starting block
A ball rolling
A person skydiving

10. # 3 Answer
Which of the following is an example of ONLY Potential Energy?
Wind blowing a windmill
A runner on the starting block *
A ball rolling
A person skydiving
STORED Energy

11. # 4
I plug in my iPad in order to charge it. What type of energy is being used to recharge my iPad?
Mechanical
Electromagnetic
Electrical
Chemical

12. # 4 Answer
I plug in my iPad in order to charge it. What type of energy is being used to recharge my iPad?
Mechanical
Electromagnetic
Electrical *
Chemical
Could you trace the flow of energy here???

13. # 5 A B
Kid A is sitting at the top of the slide getting ready to go; she has high _____________ Energy. Kid B is sliding down the slide; she has high _____________ Energy.

14. # 5 Answer A B
Kid A is sitting at the top of the slide getting ready to go; she has high POTENTIAL Energy. Kid B is sliding down the slide; she has high KINETIC Energy.

15. # 6
A television is a device that converts electrical energy into light and sound energy. Not all the energy that enters a television is converted into light and sound, however. What happens to the energy that enters a television but is not converted into light or sound?
It returns to the electrical socket.
It is stored in the wires in the television.
It is lost as heat.
It is destroyed in the conversion process.

16. # 6 Answer
A television is a device that converts electrical energy into light and sound energy. Not all the energy that enters a television is converted into light and sound, however. What happens to the energy that enters a television but is not converted into light or sound?
It returns to the electrical socket.
It is stored in the wires in the television.
It is lost as heat. *Wasted Energy
It is destroyed in the conversion process.

17. # 7
I rub my hands together creating friction. What type of energy is involved that creates friction?
Thermal
Mechanical
Chemical
Nuclear

18. # 7 Answer
I rub my hands together creating friction. What type of energy is involved that creates friction?
Thermal
Mechanical *
Chemical
Nuclear
What type of energy is the mechanical energy converted into?
Mechanical converts to THERMAL (Sound is wasted energy).

19. # 8
Kyle is riding his bicycle. He works very hard to reach the top of a hill and then coasts down the other side. Which statement best explains why Kyle does not need to work as hard as he travels downhill?
Kinetic energy is stored in the bicycle.
There is less friction between the road and the bike as it moves downhill.
No energy is lost as heat as Kyle rides downhill.
Potential energy is converted to kinetic energy as he moves downhill.

20. # 8 Answer
Kyle is riding his bicycle. He works very hard to reach the top of a hill and then coasts down the other side. Which statement best explains why Kyle does not need to work as hard as he travels downhill?
Kinetic energy is stored in the bicycle.
There is less friction between the road and the bike as it moves downhill.
No energy is lost as heat as Kyle rides downhill.
Potential energy is converted to kinetic energy as he moves downhill. *

21. Rubber band launching balls
# 9
A ball was launched 4 times from 3 different thicknesses rubber bands. The distance the ball traveled was measured each time. The average of the trials are shown. What is the Test Variable? What is the Outcome Variable?
Rubber band launching balls
Thickness of Rubber band
Avg of 4 trials (avg. distance traveled in cm)
Thin 75
Medium 94
Thick
113

22. Rubber band launching balls
# 9 Answer
A ball was launched 4 times from 3 different thicknesses rubber bands. The distance the ball traveled was measured each time. The averages for the trials are shown.
What is the Test Variable? THICKNESS OF RB What is the Outcome Variable? DISTANCE TRAVELED
Rubber band launching balls
Thickness of Rubber band
Avg. of 4 trials (avg. distance traveled in cm)
Thin 75
Medium 94
Thick
113

23. # 10
Which statement correctly compares a scientific theory with a scientific law?
A scientific theory is an observation of specific natural events under given circumstances, while a scientific law is a broad explanation of how all objects behave.
A scientific theory is a broad explanation of phenomena, while a scientific law is an observation of specific natural events under given circumstances.
A scientific theory is a vague idea about the natural world, while scientific law is based on rigorous testing involving multiple experiments.
A scientific theory is a specific explanation of a single event, while scientific law is a broad description of many events happening in a row.

24. # 10 Answer
Which statement correctly compares a scientific theory with a scientific law?
A scientific theory is an observation of specific natural events under given circumstances, while a scientific law is a broad explanation of how all objects behave.
A scientific theory is a broad explanation of phenomena, while a scientific law is an observation of specific natural events under given circumstances. **
A scientific theory is a vague idea about the natural world, while scientific law is based on rigorous testing involving multiple experiments.
A scientific theory is a specific explanation of a single event, while scientific law is a broad description of many events happening in a row.

25. 2 Tally Questions

26. # 1
The 2 types of energy (in sequential order of occurrence) that are found in the interaction of “Boiling water on the stove” are:
Thermal (stove) & Chemical (heated water)
Electrical (stove) & Thermal (heated water)
Electromagnetic (stove) & Thermal (heated water)
Nuclear (stove) & Chemical (heated water)

27. # 1 Answer
The 2 types of energy (in sequential order of occurrence) that are found in the interaction of “Boiling water on the stove” are:
Thermal (stove) & Chemical (heated water)
Electrical (stove) & Thermal (heated water)
Electromagnetic (stove) & Thermal (heated water)
Nuclear (stove) & Chemical (heated water)

28. # 2
Ms. Simpson's science students were observing a demonstration with Newton's cradle, as shown in the diagram below. They noticed that when the ball was raised and released on the left side, it hit the stationary balls, and its kinetic energy was transferred all the way to the last ball on the right, causing it to be propelled up. This action continued for a while, but as time went on, the balls did not go as high, and eventually stopped.
Why did the balls stop moving?
The combined mass of the balls could not be overcome by the force of one moving ball.
Due to the force of gravity pulling the balls down, energy was continually lost to the surrounding environment, but only due to gravity.
Due to air resistance and friction between the string and the frame, some of the energy was transferred to the surroundings.
The three middle balls blocked the energy from getting to the outside balls, so they could not rise as much.

29. # 2 Answer
Ms. Simpson's science students were observing a demonstration with Newton's cradle, as shown in the diagram below. They noticed that when the ball was raised and released on the left side, it hit the stationary balls, and its kinetic energy was transferred all the way to the last ball on the right, causing it to be propelled up. This action continued for a while, but as time went on, the balls did not go as high, and eventually stopped.
Why did the balls stop moving?
The combined mass of the balls could not be overcome by the force of one moving ball.
Due to the force of gravity pulling the balls down, energy was continually lost to the surrounding environment, but only due to gravity.
Due to air resistance and friction between the string and the frame, some of the energy was transferred to the surroundings. *
The three middle balls blocked the energy from getting to the outside balls, so they could not rise as much.

30. # 3
What would be the evidence that an object is increasing its mechanical (kinetic) energy? a. The object is not moving b. The object is slowing down c. The object is moving at a constant speed d. The object is speeding up

31. # 3 Answer
What would be the evidence that an object is increasing its mechanical (kinetic) energy? a. The object is not moving b. The object is slowing down c. The object is moving at a constant speed d. The object is speeding up

32. # 4
The picture below shows a toy car in the process of rolling down a ramp (not the whole track, just the ramp). At point X, the kinetic energy is 50 Joules (J), and the potential energy is 30 J.
What is the total energy in the system once the car reaches the bottom of the ramp?
20 J, because the energy in the system cannot change form but can be created and destroyed
80 J, because the energy in the system can change form but cannot be created or destroyed
30 J, because the potential energy is the only energy at the bottom of the ramp
50 J, because the kinetic energy is the only energy at the bottom of the ramp

33. # 4 ANS
The picture below shows a toy car in the process of rolling down a ramp. At point X, the kinetic energy is 50 Joules (J), and the potential energy is 30 J.
What is the total energy in the system once the car reaches the bottom of the ramp?
20 J, because the energy in the system cannot change form but can be created and destroyed
80 J, because the energy in the system can change form but cannot be created or destroyed ** PE + KE = total Energy!!!!
30 J, because the potential energy is the only energy at the bottom of the ramp
50 J, because the kinetic energy is the only energy at the bottom of the ramp

34. #5
The picture shows a pendulum that is released from point 1 and swings to point 5. Where in the swing of this pendulum is the relative difference between the potential and kinetic energy the smallest?
Point 3
Point 5
Points 1 and 5
Points 2 and 4

35. #5 Ans
The picture shows a pendulum that is released from point 1 and swings to point 5. Where in the swing of this pendulum is the relative difference between the potential and kinetic energy the smallest?
Point 3
Point 5
Points 1 and 5
Points 2 and 4 *
High Potential
High Potential
Inc Kinetic/dec potential
dec Kinetic/inc potential
High Kinetic

36. # 6
What is the efficiency of a blender that uses 340 J of electrical energy to blend your smoothie with 120 J of mechanical energy.

37. # 6 Answer
What is the efficiency of a blender that uses 340 J of electrical energy to blend your smoothie with 120 J of mechanical energy. Efficiency = Energy Out ÷ Energy In (x 100) 35.3 % = 120 J ÷ 340 J x 100

38. #7
Describe the forms of energy involved when watching TV.

39. #7 Answer
Describe the forms of energy involved when watching TV. Electrical to Electromagnetic (light) and sound (Mechanical) *heat is a wasted form here also.

40. # 8
What do all 6 types of Energy have in common?

41. # 8 Answer
What do all 6 types of Energy have in common? They all can be transformed into each other AND all 6 Cannot be created NOR Destroyed (Law of Conservation of Energy…..KNOW THIS!!!)

42. 4 Tally Questions

43. #1- Explain what is happening to the Mechanical Energy at each point.
Be sure to include ALL information about the energy transfer.

44. #1- Answer C A D B B B E A
Yes, it gains KE from the toss, but it quickly loses KE and gains PE B C

45. #2- The picture below shows the path of a baseball tossed in the air.
Which of the following is true
about point S?
The total energy at point S is equal to twice the total energy of the system because new energy is created as the potential energy increases.
The total energy at point S is equal to the total energy of the system because energy has been transformed as the kinetic energy decreases.
The total energy at point S is equal to half of that of the total system because all the potential energy has been destroyed.
The total energy at point S is equal to half of that of the total system because all the kinetic energy has been destroyed.
#2-

46. The picture below shows the path of a baseball tossed in the air.
Which of the following is true
about point S?
The total energy at point S is equal to twice the total energy of the system because new energy is created as the potential energy increases.
The total energy at point S is equal to the total energy of the system because energy has been transformed as the kinetic energy decreases.
The total energy at point S is equal to half of that of the total system because all the potential energy has been destroyed.
The total energy at point S is equal to half of that of the total system because all the kinetic energy has been destroyed.
#2-
ANS
If I am working with 100 J of energy, I might has 10 J of KE, and 90 of PE, then I might have 20 J of KE and 80 of PE, and so on. If I have 100 J of PE, I can ONLY have 0 J of KE UNLESS A FORCE gives the system more energy.

47. #3-
Remember Mrs. Twedt’s example of the two silver spheres? I hit them together with a piece of paper in between. Explain the energy transfer.

48. #3 answer
Remember Mrs. Twedts example of the two silver spheres? I them together with a piece of paper in between. Explain the energy transfer Sound is wasted
energy here (mechanical)
Arms moving Hitting spheres Friction b/t spheres
Mechanical Mechanical Thermal
Sparks Igniting Paper
Electromagnetic/Thermal Chemical

49. #2-
Remember Mrs. Twedts example of the radiometer? Explain the energy transfer.

50. #2-
Watch Mrs. Twedt’s example of the radiometer. Explain the energy transfer.
Sun black paper absorbs high amounts /white does not absorb much
Electromagnetic Electromagetic
(light) (radiation) *Thermal in here too unequal heating, convection results
Spinning blades
Mechanical

51. # 3
The law of conservation of energy also states that when energy is transforms/converted, the amount of “useful” energy decreases in the process. Give 2 examples of where this “Wasted” energy went from the sand/bottle experiment. EXPLAIN

52. # 3 Answer
The law of conservation of energy also states that when energy is transforms/converted, the amount of “useful” energy decreases in the process. Give 2 examples of where this “Wasted” energy went from the sand/bottle experiment AND EXPLAIN.
Energy went to:
The bottle (absorbed the Thermal from the sand AND from you)
The air (the shaking caused vibrations which transformed into sound)
Back to you (also Thermal from the sand and bottle)

53. 5 Tally Questions
FOR THE GROUP

54. Temperature(degrees C)
Shake Times
Trial 1 oC
Trial 2
Trial 3
Average oC
Uncertainty oC
True Value Range oC
Start 20 21
20.3 .5
After five minutes of shaking 24
24.5 25
Explain how I know with 100% certainty that shaking the sand resulted in a transfer of energy.

55. Temperature(degrees C)
Shake Times
Trial 1 oC
Trial 2
Trial 3
Average oC
Uncertainty oC
True Value Range oC
Start 20 21
20.3 .5
After five minutes of shaking 24
24.5 25
Explain how I know with 100% certainty that shaking the sand resulted in a transfer of energy.
Look at the True Value Range. The temperature of the sand during the initial trials was between 19.8 and 20.8 degrees Celsius. The temperature of the sand after shaking for 5 minutes was between 24 and 25 degrees Celsius. No matter WHAT, those 2 ranges do not over lap, so even WITH human error included (uncertainty), the ranges for the true value were completely different If the range for the INITIAL was degrees and the range for the after 5 minutes of shaking was degrees, they overlap. They share the values 21 and 22….SO technically, they could be the same temperature before and after. That is NOT the case with this data.

56. # 2
What are the 6 types of energy? Give me an example of each to show you understand each one……if details are needed, be sure you include them!!!!!

57. # 2 Answer
See Foldable