Energy Study Slides

Tips about content NOT in this GAME KNOW ALL DEFINITIONS AND EXAMPLES OF EACH OF THE 6 TYPES OF ENERGY USE 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 KE, PE and convert temp!

5 Point Questions Sequential order…Person 1, 2, 3…. This order must be the same throughout the entire game. HOWEVER, everyone must answer on white boards this time…but only ONE person has the long board….official answer.

# 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

# 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

# 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

# 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

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

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

# 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

# 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

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

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

Rubber band launching balls # 6 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

Rubber band launching balls # 6 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

# 7 The amount of kinetic energy an object has depends on its: a. Mass and volume b. Volume and friction c. Mass and speed d. Speed and density

# 7 answer The amount of kinetic energy an object has depends on its: a. Mass and volume b. Volume and friction c. Mass and speed * d. Speed and density Honors— Remember KE = PE (Law) KE = ½ mass X speed (velocity) *Know GPE too!

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

# 8 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

BONUS What type of waves are Electromagnetic waves?

Bonus Answer What type of waves are Electromagnetic waves? Transverse

10 Point Questions

# 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)

# 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)

# 2 What type of Mechanical Energy Interaction (force) is found when a ping pong ball hits the rubber paddle? Drag Applied Elastic Friction

# 2 Answer What type of Mechanical Energy Interaction (force) is found when a ping pong ball hits the rubber paddle? Drag Applied Elastic Friction

# 3 When the ping pong paddle launches the ball, eventually, drag (and gravity) act on the ball. How does the energy change in the ball as drag and gravity act on it? Increases in mechanical (kinetic) energy Increases in chemical energy Decreases in mechanical (kinetic) energy There is no energy change in the ball

# 3 Answer When the ping pong paddle launches the ball, eventually, drag (and gravity) act on the ball. How does the energy change in the ball as drag and gravity act on it? Increases in mechanical (kinetic) energy Increases in chemical energy Decreases in mechanical (kinetic) energy There is no energy change in the ball

# 4 A horse pulls a carriage. This is what type of Mechanical Interaction (force)? Elastic Friction Applied Drag

# 4 Answer A horse pulls a carriage. This is what type of Mechanical Interaction (force)? Elastic Friction Applied Drag

# 5 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

# 5 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

# 6 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.

# 6 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.

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

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

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

# 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!!!)

20 Point Questions

#1- 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.

#1 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) Food Hitting spheres Friction b/t spheres Chemical Mechanical Thermal Igniting Paper Thermal/Chemical

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

#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

# 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

# 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)

25 Point Questions FOR THE GROUP

  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 19.8-20.8 After five minutes of shaking 24 24.5 25 24.0-25.0 Explain how I know with 100% certainty that shaking the sand resulted in a transfer of energy.

  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 19.8-20.8 After five minutes of shaking 24 24.5 25 24.0-25.0 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 20-22 degrees and the range for the after 5 minutes of shaking was 21-24 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.

# 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!!!!!

# 2 Answer See Foldable and/or J# 8 on www.mrs-twedt.com