Energy Transformation IA#1 Review

Energy Transformation IA#1 Review

By: Ms. Bailey

​What is the Law of Conservation of Energy?

Fill in the Blank

what is the Law of Conservation of Energy ?

SS: The Law of Conservation of energy says....

Multiple Choice

What is the Law of Conservation of energy?

• energy can be created or destroyed

• energy can not be created nor destroyed

• energy can be created but not destroyed

• energy can not be created bu van be destroyed.

​Law of Conservation of Energy

​ENERGY CAN NOT BE CREATED NOR DESTROYED, ONLY TRANSFERRED FROM ONE TYPE TO ANOTHER.

Fill in the Blank

Describe all the transfers on energy that take place to light up a flashlight.

SS: The energy transfers that take place are:

Multiple Choice

The transfer of energy that takes place in a flash light is...

• mechanical ( switch) to electrical ( wires) to light ( bulb)

• battery ( chemical ) to mechanical ( switch) to light ( bulb)

• battery ( chemical ) to mechanical ( switch) to electrical ( wires) to light ( bulb)

• battery ( chemical ) to electrical ( wires) to light ( bulb)

​LETS WATCH !!

​PLEASE PAY ATTENTION !

​We are going to watch a quick video on the different types of energy. On the next slide you will have to match the definition with the type of energy.

​1. Mechanical

​2. Light

​3. Thermal

​4. Chemical

​5. Electrical

​6. Sound

Multiple Choice

mechanical energy is....

• energy stored in the bonds between atoms and molecules

• caused by moving electric charges called electrons

• movement of energy through air or water caused by vibrations

• motion energy that is stored in. moving objects

Multiple Choice

Light energy is...

• movement of energy through air or water caused by vibrations

• also called radiant energy; a form of electromagnetic energy that takes the form which ur senses of sight can detect.

• motion energy stored in moving objects

• energy stored in the bonds of atoms and molecules

Multiple Choice

Thermal energy is...

• Heat energy; produced when a rise in temperature causes molecules to move faster and collide with each other.

• energy store in the bonds of atoms and molecules.

• motion energy that is stored in moving objects

Multiple Choice

chemical energy is...

• movement of energy through air or water caused by vibrations

• energy stored in the bonds between atoms and molecues

• caused by moving electric charges called electrons

Multiple Choice

Electrical energy is...

• het energy; produced when a rise in temperature causes the molecules to move faster and collide

• motion energy that is stored in moving objects

• also called radiant energy; a form of electromagnetic energy that takes the form which our senses of sight can detect.

• caused by moving electric charges called electrons.

Multiple Choice

sound energy is....

• movement of energy through water or air caused by vibrations

• energy stored in the bonds of atoms and molecules

• motion energy that is stored in moving objects.

Open Ended

What is the difference between kinetic and potential energy?

SS: The difference between kinetic and potential energy is...

Open Ended

Give an example of kinetic and potential energy.

SS: An example of kinetic energy is_____. An example of potential energy is_____.

​Kinetic and Potential Energy

​We are going to watch another video that briefly explains the difference between kinetic and potential energy.... PAY ATTENTION!!

Multiple Choice

Kinetic energy is...

• energy of motion

• energy the is stored

Multiple Choice

Potential energy is...

• motion energy

• stored energy

Multiple Choice

At which point does the ride have the greatest potential energy?

• A

• B

• C

• D

Multiple Choice

Which position has the greatest kinetic energy?

• A

• B

• C

• D

Fill in the Blank

Why does point A have the greatest potential energy?

SS: Point A has the greatest potential energy because...

Fill in the Blank

Why does point B have the greatest kinetic energy?

SS: Point B has the greatest potential energy because...

​KEY CONCEPT #1

​Kinetic and potential energy are both types of energy available to do work or cause change.

​KEY CONCEPT #2

​Kinetic energy is the energy of motion and increases as mass, velocity or both mass and velocity increases.

​KEY CONCEPT #3

​Potential energy is stored energy and is determined by an object’s mass and relative position.

​Gravitational Potential Energy

​Stored energy in an object because of its higher position compared to a lower position due to gravity

Open Ended

A man is standing on his snow skis on a ski slope near the top of a mountain.  As he leans forward, gravity pulls on him, causing the man to ski down the slope.  At the bottom of the slop, the man turns sharply to his right and comes to a stop.  What type of energy is shown in this scenario?

Multiple Choice

A man is standing on his snow skis on a ski slope near the top of a mountain.  As he leans forward, gravity pulls on him, causing the man to ski down the slope.  At the bottom of the slop, the man turns sharply to his right and comes to a stop.  Which of the following statements correctly describes the energy associated with the man?

• The kinetic energy of the man increases as his velocity increases as he skis down the slope.

• All of the potential energy of the man is converted to kinetic energy at the bottom of the slope.

• The man’s kinetic energy is greatest at the top of the slope.

• The man’s potential energy is increasing as the force of gravity is pulling him down the slope.

Open Ended

Kinetic energy and potential energy are two different types of energy, but both types give an object the ability to do work.  What is another similarity between kinetic and potential energy?

Multiple Choice

Kinetic energy and potential energy are two different types of energy, but both types give an object the ability to do work.  Which of the following is another similarity between kinetic and potential energy?

• Both kinetic and potential energy can be created or destroyed.

• The magnitude of the kinetic energy and the potential energy of an object does not depend upon the object’s mass.

• Both kinetic and potential energy can cause a change in an object.

• Neither kinetic energy nor potential energy can exist in space.

Open Ended

Energy transformations occur even in the most simple tasks.  Give an example that best demonstrates how mechanical energy is transformed into heat energy?

Multiple Choice

Energy transformations occur even in the most simple tasks.  Which of the following examples best demonstrates how mechanical energy is transformed into heat energy?

• A child leaves his metal toy car outside for several hours.  When he tries to pick it up in the day, he drops the car quickly because it burns his fingers.

• A student drags his socked feet across a carpeted floor.  He touches a metal door knob and see’s a spark shoot across his fingers to the door knob.

• A boy flattens a metal BB pellet with a hammer.  He blows on the warmed pellet before picking it up.

• A school teacher places her frozen meal in a microwave oven and runs the oven on “High” for five minutes to cool the meal.

Open Ended

During a thunderstorm, power to Diego’s house is lost.  He finds his flashlight and turns on the switch, but no light is emitted from the flashlight.  He remembers that he forgot to recharge the flashlight’s rechargeable batteries.  Which energy transformation did not occur as a direct result of Diego not recharging the battery?

Multiple Choice

During a thunderstorm, power to Diego’s house is lost.  He finds his flashlight and turns on the switch, but no light is emitted from the flashlight.  He remembers that he forgot to recharge the flashlight’s rechargeable batteries.  Which energy transformation did not occur as a direct result of Diego not recharging the battery?

• electrical energy → light energy

• chemical energy → electrical energy

• chemical energy → light energy

• electrical energy → chemical energy

​Sample Questions

​Now, ladies and gentlemen, we are getting ready to review some sample questions that they have used in previous years on the STAAR test.

​1. Make sure you title your page: Energy Transformation Justifications Review #1

​2. Justify th answer choices

​a- wrong and why

​b- alomst correct and why

​c- correct and why

Multiple Choice

In the classroom demonstration below, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy

• one

• two

• three

• four

Multiple Choice

The main parts of a working clothes dryer are shown in the diagram. This appliance dries clothes primarily by converting —

• Electrical energy to heat and mechanical energy

• Mechanical energy to heat and electrical energy

• Electrical energy to heat and light

• Mechanical energy to heat and vaporization

Multiple Choice

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

• The chemical energy stored in the match changed to thermal and light energy.

• The thermal energy stored in the match changed to light energy and chemical energy.

• The light energy and thermal energy stored in the match changed to mechanical energy.

• The light energy and thermal energy stored in the match changed to chemical energy.

Multiple Choice

The diagram below shows how coal is a fuel source that uses heat energy to turn mechanical energy into electrical energy. Between which two points is heat energy converted into mechanical energy?

• one and two

• two and three

• three and four

• six and seven

Multiple Choice

• A

• B

• C

• D

Multiple Choice

The picture below shows what a baseball looks like when it is thrown from a girl's hand. The baseball leaves the girl's hand at point R, travels to its highest point at point S, and is falling to the ground at point T. What type of energy does the baseball have at each point?

• R-kinetic, S-electrical, T-potential

• R-potential, S-kinetic, T-potential

• R-kinetic, S-potential, T-kinetic

• R-potential, S-electrical, T-potential