Download energy around us

Objective: To examine real life situations
involving energy use in order to
analyze how energy can be
transformed from one form to another.
ENERGY Note: How does energy change forms?
Drill:
1. Get both dittos from the SET.
2. Complete the Drill on the energy ditto
to prepare for Open Discussion.
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OPEN DISCUSSION
Jack Matthew Ledieu says, “I know that energy can
be converted from one type (kind) to another
based on our pendulum experiment. (Potential
energy can be converted into kinetic energy and
vice versa.) However, you cannot change energy
from one form to another.” Do you agree or
disagree with Jack? Explain your position. You
have 5 minutes to prepare your response for Open
Discussion.
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Activity 1: Forms of Energy – Recap
a. View the energy card being displayed.
b. Choose the card with the form of energy
that matches the displayed card.
c. Show your card when instructed to. (The
back of your card should have clues.)
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BACKGROUND INFORMATION
Energy is all around you in many different forms.
The energy around us is being stored, transformed
or transferred at all times. Any device that
undergoes an energy conversion where stored
energy (potential energy) is changed to active
energy (kinetic energy) undergoes an energy
trans"form"ation. These energy transformations
enable batteries, flashlights, toasters, video
games, cars, and even you to do work.
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According to the law of
conservation of energy, energy is
neither created nor destroyed,
but converted to other forms.
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SEGAL ART DEMO
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Activity 2: Demonstration
1. Observe the teacher demonstration.
2. Predict the energy types and forms involved
in the demonstration. Circle your choices
and justify your selections in the boxes
below.
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BEFORE:
Kind – Potential
Form – Chemical
Energy is stored in the chemicals on the tip of
the match.
AFTER:
Kind – Kinetic
Form – Thermal & EM
The burning match generates heat which is
thermal energy and light which is
electromagnetic energy. Both are kinetic
energy.
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HOMEWORK
1. Preview Lab
2. Forms of Energy Ditto
3. Quiz Friday
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Objective: To examine real life situations
involving energy use in order to
analyze how energy can be
transformed from one form to another.
ENERGY Note: How does energy change forms?
Drill:
1. Take out your lab sheets.
2. On your dry erase board, write both
parts of the Law of Conservation of
Energy.
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HOMEWORK
ENERGY CONVERSION DITTO
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Objective: To examine real life situations
involving energy use in order to
analyze how energy can be
transformed from one form to another.
ENERGY Note: How does energy change forms?
Drill:
1. Take out your lab and your homework.
2. Identify a homework question that you
had difficulty with.
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Let’s RECAP
1. Homework – 2 freebees
2. Station Recap
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Example 1: Fan
Observe the fan. Think! Ask yourself, from
where does the energy come to make the
blades move? Record! Turn it on. What
form/forms of energy is/are represented by
the blades moving? Record!
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BEFORE:
Kind – Kinetic
Form – Electrical
AFTER:
Kind – Kinetic
Form – Mechanical
The electrical energy (moving electrons)
is transformed into mechanical energy
represented by the moving blades.
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Example 2: Effervescent Tablet
Observe the effervescent tablet. Think about
the energy represented by the tablet.
Record! Place it into a beaker of water. What
forms of energy are represented by the bubbles
moving? Record!
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BEFORE:
Kind – Potential
Form – Chemical
AFTER:
Kind – Kinetic
Form – Mechanical
There are chemicals in the tablet which
represent stored chemical energy. When the
tablet is placed into the water a chemical
reaction takes place and the chemical energy is
converted to mechanical energy as the gases
move through the water.
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Example 3: Toaster Oven
Observe the toaster oven. Think! Ask yourself,
from where does the energy come to make
the toaster oven work? Record! Turn it on.
What form/forms of energy is/are represented
by the working oven? Record!
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BEFORE:
Kind – Kinetic
Form – Electrical
AFTER:
Kind – Kinetic
Form – Thermal
The electrical energy (moving electrons)
is transformed into thermal energy as
the coils in the oven get hot.
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Example 4: Car and Ramp
Observe the car and ramp. Place the car at the
top of the ramp. Think! Ask yourself, “What
energy does the car have at the top of the
ramp before it moves? Release the car. What
form/forms of energy is/are represented by
the car moving? Record!
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BEFORE:
Kind – Potential
AFTER:
Kind – Kinetic
Form – Mechanical
Form – Mechanical
Form – Thermal
When the car is at the top of the ramp it has
potential mechanical energy due to the
height. After release it is converted into
mechanical (movement) and thermal (heat).
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Example 5: You
Observe your hands. Start rubbing them
together. Ask yourself, what form of energy is
represented by your hands rubbing? Record!
What form/forms of energy were represented
by what you felt? Record!
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BEFORE:
Kind – Kinetic
Form – Mechanical
AFTER:
Kind – Kinetic
Form – Thermal
Rubbing hands together represents
mechanical kinetic energy as the hands are
moving. This is converted to thermal energy
as the rubbing generates heat due to friction.
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Wrap Up
Analysis Ditto
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HOMEWORK
Day 3
Ditto 5-1
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