1. Introduction to Energy Essential Question: What is energy?
Big Idea:
Energy Exits in different forms and can change from one form to another, but energy is always conserved.
Unit 2 Lesson 1
Introduction to Energy
Essential Question:
What is energy?

2. Forms of Energy??????

3. X X X X
Sound from this marching band is caused by vibrations of air particles
A law that states that energy cannot be created or destroyed but can change forms (be transformed)

4. kinetic energy potential energy Get Energized!
Unit 2 Lesson 1 Introduction to Energy
Get Energized!
What are two types of energy?
Energy is the ability to cause change.
Energy takes many different forms and causes many different effects.
There are two general
types of energy:
kinetic energy
potential energy

5. Potential Energy
Kinetic Energy

6. What are two types of energy?
Unit 2 Lesson 1 Introduction to Energy
What are two types of energy?
Kinetic energy is the mechanical energy of an object that is due to motion. All moving objects have kinetic energy.
The amount of kinetic energy an object has depends on its mass and speed (Velocity).
Kinetic energy increases as mass increases and/or as velocity (speed) increases.

7. What are two types of energy?
Unit 2 Lesson 1 Introduction to Energy
What are two types of energy?
Potential energy is the mechanical energy that an object has due to its position, condition, or chemical composition.
Potential energy that is the result of an object’s position is called gravitational potential energy.
Gravitational potential energy (GPE) increases as the object’s height or mass increases.

8. What are two types of energy?
Unit 2 Lesson 1 Introduction to Energy
What are two types of energy?
Potential energy is the mechanical energy that an object has due to its position, condition, or chemical composition.
Potential energy that is the result of an object’s condition is called elastic potential energy.
A change in the condition of an object affects its potential energy.
Stretching a rubber band increases its potential energy

9. What are two types of energy?
Unit 2 Lesson 1 Introduction to Energy
What are two types of energy?
Potential energy is the mechanical energy that an object has due to its position, condition, or chemical composition.
Potential energy that is the result of an object’s chemical composition is called chemical potential energy (CPE).
Chemical potential energy depends on chemical composition.
As bonds break and new bonds form between atoms during a chemical change, energy can be released.
When a fuel burns in air, the hydrocarbons break up into simpler compounds.
The chemical potential energy they contain is then released as heat energy.
Light energy is produced at the same time and this is what makes a fire glow as it burns

10. Can objects have potential and kinetic energy at the same time?
Unit 2 Lesson 1 Introduction to Energy
Can objects have potential and kinetic energy at the same time?
An object can have both potential and kinetic energy at the same time.
The story of kinetic and potential energy

11. 6) Other things that show PE & KE
Unit 2 Lesson 1 Introduction to Energy
6) Other things that show PE & KE

12. No, because he is at the bottom of the ramp.
p103
Unit 2 Lesson 1 Introduction to Energy
7) Analyze: Do you think that the skater has any GPE at pt C (3)? Explain
No, because he is at the bottom of the ramp.
Gravity cannot pull him any lower, so he has no GPE
Energy transfer inside a half pipe.
1) All potential energy
2) Potential becoming Kinetic
3) All Kinetic energy
4) Kinetic becoming Potential
5) All Potential Energy

13. Potential Energy Kinetic Energy General form of energy
The story of kinetic and potential energy
Increases as mass or height increases
Due to position, condition, & chemical composition
Energy due to motion
General form of energy
Position:
Gravitational potential energy
All moving object
Depend on Mass
Depends on mass and speed
Potential Energy
Condition:
Elastic potential energy
Kinetic Energy
Ability to cause change
Measured in Joules
Chemical Composition
Bonds break & /or new bonds form
increases as mass increases
Mechanical Energy
increases as speed increases

14. p104
Unit 2 Lesson 1 Introduction to Energy
In Perfect Form
What forms can energy take?
Kinetic energy and potential energy are two types of energy that can come in many different forms.
mechanical, sound, electromagnetic, electrical, chemical, thermal, and nuclear energy.
Energy is expressed in joules (J).

16. Mechanical Energy P104-105 Sum of Kinetic and Potential Energy
Energy of Position and Motion
Moving car
Can be all kinetic, all potential or a combination
Put on back of notes

17. Sound Energy Electromagnetic Energy Electrical Energy Kinetic Energy
Travels through space in electromagnetic waves
Vibrations of electrically charged particles.
Electric and Magnetic Properties
X-rays, microwaves, visible light, sun P
Sound Energy
Kinetic Energy
Vibration of particles of the medium it’s traveling through
Electrical Energy
Kinetic and Potential Energy
Position and Motion of charged particles (electrons –)
Lights, computer

18. Chemical Energy Thermal energy Nuclear Energy Kinetic Energy
Particles are in motion
As motion increases, KE increases, Temperature increases
Heat is energy transferred from the area of higher temp to area of lower temp
Chemical Energy
Potential Energy
Bonds break and new bonds form.
Food, batteries, matches
Nuclear Energy
Potential Energy
Nucleus of an atom is the source.
Fission: nucleus splits (breaks apart)
Fusion: Nuclei join together
Energy is released
SUN P

19. What forms can energy take?P
Unit 2 Lesson 1 Introduction to Energy
What forms can energy take?
8) What forms of energy can you identify in
this pinball game?
Electromagnetic B
Sound C
Mechanical A
Copyright © Houghton Mifflin Harcourt Publishing Company

20. P
Unit 2 Lesson 1 Introduction to Energy
9) How does electrical energy differ from electromagnetic energy?
Electromagnetic energy is caused by vibration of electrically charged particles. Transmitted by waves.
Electrical energy is caused by the position or motion of electrically charged particles.
10) Would you expect to detect electrical energy if you played the pinball game? Explain
The pinball machine is powered by electrical energy as inferred by the lights, sounds (rings where the ball hits the bumper) and motion of the flippers.

21. Pg 106
Unit 2 Lesson 1 Introduction to Energy
12) Why is the chemical energy of a battery potential energy and not kinetic energy?
The energy in the chemicals is stored energy. The battery must be placed into a completed electrical circuit for the energy to create an electric current.

22. Unit 2 Lesson 1 Introduction to Energy
In Perfect Form WS
You can determine an object mechanical energy by adding together the objects kinetic and potential energy.
B,C,E,F (electrical, thermal, chemical, electromagnetic)
A (mechanical)
A,B,C,F (mechanical, electrical, thermal, electromagnetic)
B,C,F (electrical, thermal, electromagnetic)
C,D,F (thermal, nuclear, electromagnetic)
A,C,E,F (mechanical, thermal, chemical, electromagnetic)

23. Transformers What is an energy transformation? Pg 108-109
Unit 2 Lesson 1 Introduction to Energy
Transformers
What is an energy transformation?
An energy transformation takes place when energy changes from one form into another form.
Any form of energy can change into any other form of energy.
Often, one form of energy changes into more than one form.

24. What is an energy transformation?Pg
Unit 2 Lesson 1 Introduction to Energy
What is an energy transformation?
In a flashlight, chemical energy (battery) is transformed into electrical energy.
The electrical energy is then transformed into light and thermal energy. 24

25. Pg
Unit 2 Lesson 1 Introduction to Energy
Is energy conserved?
A closed system is a group of objects that transfer energy only to one another. Energy is conserved in all closed systems.
The law of conservation of energy states that energy cannot be created or destroyed. It can only change forms.
All of the different forms of energy in a closed system always add up to the same total amount of energy.
17) Relate
The law of conservations of energy states energy is not created not destroyed: it can only change forms. An energy transformation is a change from one form of energy to another.

26. Energy Transformations when you strike a match?Pg
Unit 2 Lesson 1 Introduction to Energy
Energy Transformations when you strike a match?
__________________________________________________ __________________________________________________
_______
__________
______________
____________________________ 26

27. Energy Transformations when you strike a match?Pg
Unit 2 Lesson 1 Introduction to Energy
Energy Transformations when you strike a match?
Striking the match (Chemical Potential Energy) transforms mechanical energy to thermal energy & sound energy.
Thermal Energy causes particles to release chemical energy.
Chemical energy is transformed to thermal and electromagnetic energy.
Chemical Potential
Mechanical
Thermal & Sound
Chemical
Thermal (heat)
& Electromagnetic (light) 27

28. Energy Transformations when you bounce a ball?Pg
Unit 2 Lesson 1 Introduction to Energy
__________________________________________________ __________________________________________________
_____
______________________ 28

29. Energy Transformations when you bounce a ball?Pg
Unit 2 Lesson 1 Introduction to Energy
1) As the ball falls, gravitational potential energy is transformed to kinetic energy.
2) While the ball is in contact with the floor, kinetic energy transforms into elastic potential energy and then back to kinetic energy.
3) As the ball travels upward, kinetic energy is transformed to potential energy.
4) The ball does not return to original height because some K.E. is transformed to Thermal energy or Sound during a bounce.
GPE KE
EPE
Thermal and Sound Energy 29

30. Space Weather and Technology
Unit 2 Lesson 1 Introduction to Energy
Space Weather and Technology
Space weather includes any activity happening in space that might affect Earth’s environment.
Space weather can damage satellites and interrupt phone signals and signals to Global Positioning System (GPS) receivers.
Auroras are caused by electrically charged particles of solar winds hitting Earth’s magnetic field. They can interrupt airplane communications.
Copyright © Houghton Mifflin Harcourt Publishing Company

31. Space Weather and Technology pg 107
Unit 2 Lesson 1 Introduction to Energy
Space Weather and Technology pg 107
13) Identify: what type of energy is monitored by scientists forecasting future space weather? ______________________________________________________________________________________________________________________________________________________________________________________________________
14) Infer: Why is space weather a bigger concern now than it was in the past? ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
15) Research: How do scientists forecast space weather? Why? __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Copyright © Houghton Mifflin Harcourt Publishing Company

32. Energy Work Power is the ability to do exists as measured in
which at a given rate is
can be
Power

33. Draw and fill in into your notes Review
Energy
is the ability to do
exists as
measured in
Kinetic energy
Potential energy
Joules
Work
which at a given rate is
can be
Elastic
Gravitational
Power