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9/13/16
Energy
Unit
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9/13/16
Energy Probe
Name: ____________________________________ Date: ________________ Period: ________
Energy Probe
1. Look at the pictures on the back of this paper. Circle at least 10 objects that have energy.
2. a. Pick three of the objects that you circled and list them below.
1. ___________________________
2. ___________________________
3. ___________________________
b. For each object listed above, describe how you know it has energy.
1. ______________________________________________________________________________________________________________________________________________________
2. ______________________________________________________________________________________________________________________________________________________
3. ______________________________________________________________________________________________________________________________________________________
3. In your own words, what is energy?
____________________________________________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________
4. As we begin our time studying energy, what is one thing you would like to better understand about energy?
____________________________________________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________
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9/13/16
What is Energy?
Come up with 3 things that have energy.



 Energy is the ability to do work.
o Ability to cause change.
 It can change the temperature, shape, speed, or direction of
an object.
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9/14/16
Forms of Energy
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9/19/16
Energy Forms Practice
Develop examples for each type of energy.
Kinetic
Potential
Thermal
Chemical
Mechanical
Elastic
Electrical
Nuclear
Magnetic
Gravitational
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9/20/16
Law of Conservation of Energy
 According to this law, energy can neither be created nor be
destroyed, it can ONLY be converted from one form to
another.
 When energy is converted from one form to another, then
the total amount of energy remains the SAME.
Energy Type
Energy Type
Location
Location
Before
After
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9/21/16
Energy Transfer and Transformation
Energy Transfer
When energy is moved from one location to another and the type
of energy remains the same, then it is called energy transfer.
Thermal Energy
Thermal Energy
Stove
Pan
Before
After
Energy Transformation
When energy is changed from none type to another and the
location also changes, then it is called energy transformation.
Light Energy
Chemical Energy
Sun
Plant
Before
After
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9/27/16
Tracking Energy Movement
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9/27/16
Tracking Energy Movement
Light Energy
Light Energy
Light Energy
Sun
Sun
Sun
Light Energy
Light Energy
Light Energy
Sun
Sun
Sun
Nuclear Energy
Light Energy
Thermal Energy
Sun
Sun
Earth
Mechanical
Energy
Animal
Thermal Energy
Animal
Chemical Energy
Plant
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9/28/16
What are Waves?
 A wave is a disturbance that transfers energy from place to
place.
 Most waves need something to travel through, a medium.
o Gases (such as air), liquids (such as water), and solids
(such as rope) can all act as mediums.
 Waves that require a medium to travel through are called
mechanical waves.
 Waves that do not require a medium to travel through are
called electromagnetic waves.
Wavelength (λ) Lambda
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9/29/16
Properties of Waves
Amplitude: the maximum distance that the particles of the
medium carrying the wave move away from their rest
position.
Wavelength: the distance between two corresponding parts
of a wave.
Frequency: the number of complete waves that pass a given
point in a certain amount of time.
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10/03/16
Sound
 Sound needs matter/medium to travel and it begins with a
vibration.
o It can travel through solids, liquids, and gases.
o no matter = no sound
 Sound carries energy through a medium without carrying the
medium itself.
 Sound travels as a Longitudinal Wave (side to side)
 The speed of sound depends on the elasticity, density, and
temperature of the medium sound travels through.
 Loudness- depends on the amount of energy used to make
the sound and the distance from the source of the sound .
o This is the amplitude of the wave.
 Pitch- how high or low a sound seems to a person. Pitch
depends on the frequency of a sound wave.
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10/4/16
Light
 Electromagnetic Spectrum (EM Spectrum) describes all the
different wavelengths of light.
o They do not require a medium, and can travel through
empty space.
 Light travels as a Transverse Wave (up and Down)
 Out of all the different wavelengths we can only see “Visible
Light”.
 Visible light is white in color, but contains all the colors of a
rainbow.
 Light becomes colored when you find a way to separate the
different wavelengths.
ROYGBV
Red
Orange Yellow Green Blue Violet
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10/5/16
Electromagnetic Spectrum
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10/11/16
Sound vs. Light
Sound
•
Needs matter/medium to travel
• Can hear
• Travels slowly
• Longitudinal wave (side to side)
Similarities
•
Can be slowed down when they travel through different materials
• Travel as waves and transfer energy
• Measured in terms of Wavelength
Light
•
Does not need medium to travel
• Can see
• Travels very fast
• Transverse wave (up and down)
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10/12/16
How Do We See Colors?
Sun
White
Light
R
Apple
Black Color = Absorbs all the colors of visible light
White Colors = Reflect all the colors of visible light
Eye
Apple