Download energy - cloudfront.net

ENERGY!
MS-PS3-1.
Construct and interpret graphical displays of data to describe the relationships of
kinetic energy to the mass of an object and to the speed of an object. [
MS-PS3-2.
Develop a model to describe that when the arrangement of objects interacting at a
distance changes, different amounts of potential energy are stored in the system.
MS-PS3-4.
Plan an investigation to determine the relationships among the energy transferred,
the type of matter, the mass, and the change in the average kinetic energy of the
particles as measured by the temperature of the sample.
MS-PS1-6.
Undertake a design project to construct, test, and modify a device that either
releases or absorbs thermal energy by chemical processes.*
Unit 3 Energy Day 1
OBJECTIVE:
MS-PS3-2. Develop a model to describe that when the arrangement of
objects interacting at a distance changes, different
amounts of potential energy are stored in the system.
•Do Now:
•SIA Physics Week #3
•Today:
•Einstein’s Theory is 100
•CER: Energy and Work
•Do Later:
•Enjoy the weekend
Q: How is Energy Related to Work?
• To gather your EVIDENCE:
– Place two identical books on a table so there is a gap of about 8
cm between the books.
– Place a sheet of notebook paper on the books so it crosses the
gap (lengthwise.)
– Now drop a penny from a height of 10 cm onto the paper above
the gap. Note what happens.
– Next drop the penny from a height of 30 cm and observe the
results.
– Devise a third test…Distance? Mass? Force? Other?
• Consider the following as you write your
REASONING statements:
– How do the three "drops” compare and differ?
– How did the height of the penny affect the distance the paper
moved?
– How did lifting the penny affect the work it did on the paper?
– How did lifting the penny affect its energy?
Unit 3 Energy Day 2
OBJECTIVE:
MS-PS3-1. Construct and interpret graphical displays of data to
describe the relationships of kinetic energy to the mass of
an object and to the speed of an object.
•Do Now:
•Energy Vocabulary and Examples
•Return Phys Test/NB/Lab
•Today:
•Energy! Notes
•Energy Card Sort Table Activity – Part 1
•Do Later:
•FINISH Energy examples!
Unit 3 ENERGY Day 3
OBJECTIVE:
MS-PS3-2 Develop a model to describe that when the arrangement
of objects interacting at a distance changes, different amounts of
potential energy are stored in the system.
•Do Now:
•Energy Forms Crossword
•Today:
•KE and GPE calculations
•Energy Card Sort Table Activity – Part 2
•Do Later:
•KE and GPE practice problems
Unit 3 Chapter 15 Day 4
OBJECTIVE:
MS-PS3-1. Construct and interpret graphical displays of data to
describe the relationships of kinetic energy to the mass of
an object and to the speed of an object.
•Do Now:
•Force and Energy worksheet
•Homework Check – GE and KPE problems
•Today:
•A few more KE & GPE problems…
•Energy Card Sort Activity wrap-up
•Energy! Notes - Conversion
•“Your Turn”
Unit 3 ENERGY Day 5
OBJECTIVE: MS-PS1-6.
Undertake a design project to construct, test, and modify a device that
either releases or absorbs thermal energy by chemical processes
.*
•Do Now:
• Roller Coasters - review of PE/KE
•Today:
• Energy Card Sort Activity wrap-up
•The Heat is On…
•Do Later:
• FINISH Heat Is On - Questions #_____
Unit 3 ENERGY Day 6
OBJECTIVE:
.
•Do Now:
•?
•Homework Check/Review
•Today:
•Thermal Chemistry – Salt Melt
or
•Thermal Chemistry – Acid Freeze
•Do Later:
•Finish Lab Report
https://www.youtube.com/watch?v=QF27bncXAQ
• An electrical conductivity meter (EC meter)
measures the electrical conductivityin a
solution. It is commonly used in hydroponics,
aquaculture and freshwater systems to
monitor the amount of nutrients, salts or
impurities in the water.
Unit 3 ENERGY Days 7 -9
OBJECTIVE:
Research and Present Alternative Energies
•Do Now:
•Alternative Energy Word Search
•Sign out a Chrome book and Login
•Today:
•Alternate Energy Poster Research,
Assembly and Presentation Practice
•Alternate Energy Poster Presentations
•Do Later:
•Everyday Energy - Hoover Dam
Unit 3 ENERGY Day 10
OBJECTIVE:
Review skills and concepts of Energy Unit.
•Do Now:
•?
•Today:
• Review Study Guide
•Do Later:
•Study for Test
•Notebooks due tomorrow
Unit 3 ENERGY Day 11
OBJECTIVE:
Demonstrate skills and concepts of Energy Unit.
•Do Now:
• TURN IN NOTEBOOK
•Today:
• Energy Unit Test
•Do Later:
•
Chapter 15.1 – Energy Forms
• ENERGY is
the ability to
do WORK
• WORK is the
Transfer of
Energy
TYPES OF
ENERGY
Kinetic and
Potential: GPE & EPE
What is Kinetic Energy?
•The energy of MOTION
–Greek “kinetos” means moving
•Depends upon the objects
MASS and SPEED
oDOUBLE the mass and you
DOUBLE the kinetic energy
oDOUBLE the speed and you
QUADRUPLE the kinetic energy
Examples of Kinetic Energy
What is Potential Energy?
Potential Energy is energy that is stored as
a result of position or shape.
• Gravitational Potential Energy (PE=mgh)
Depends on MASS, HEIGHT and the
acceleration of GRAVITY (9.8 m/s2 )
–DOUBLE the MASS or the HEIGHT
DOUBLE the Gravitational Potential Energy
• Elastic Potential Energy
• Objects that can be stretched or compressed
• When stored energy is released it is converted to
Kinetic Energy
• EPE can be stored in compressed objects like springs
Examples of Potential Energy…
What kind?
TYPES OF
ENERGY
Mechanical,
Electromagnetic,
Electrical,
Chemical, Thermal
And Nuclear
What is Mechanical Energy?
Energy due to a object’s
motion (kinetic) and
position (potential).
The bowling ball has
mechanical energy.
When the ball strikes
the pins, mechanical
energy is transferred to
the pins!
Examples of Mechanical Energy
What is Electromagnetic
Energy?
Light energy
Includes energy from
gamma rays, x-rays,
ultraviolet rays, visible
light, infrared rays,
microwave and radio
bands
What is Electrical Energy?
Energy caused by
the movement of
electrons
Easily transported
through power lines
and converted into
other forms of energy
What is Chemical Energy?
Energy that is
available for release
from chemical
reactions.
The chemical bonds in
a matchstick store
energy that is
transformed into
thermal energy when
the match is struck.
Examples of Chemical Energy
What is Thermal Energy?
o Heat
energy
o The heat energy of an
object determines how
active its atoms are.
A hot object is one whose atoms
and molecules are excited and
show rapid movement.
A cooler object's molecules and
atoms will show less movement.
QUIZ TIME!
What type of energy
cooks food in a
microwave oven?
ELECTROMAGNETIC
ENERGY
What type of energy is
the spinning plate inside
of a microwave oven?
MECHANICAL ENERGY
QUIZ TIME!
Electrical energy is
transported to your house
through power lines.
When you plug an electric fan
to a power outlet, electrical
energy is transform into what
type of energy?
MECHANICAL ENERGY
QUIZ TIME!
What energy transformation
occurs when an electric lamp is
turned on?
ELECTRICAL ENERGY

ELECTROMAGNETIC ENERGY
What type of energy is shown below?
Chemical Energy (yummy)
What types of energy are shown below?
Mechanical and Thermal Energy
(Don’t forget friction)
What type of energy is shown below?
Chemical Energy
What type of energy is shown below?
Thermal Energy…more?
What types of energy are shown below?
Electrical, Mechanical and
Electromagnetic Energy…more?
MY CAR
• Think about energy and the transformations
as my car goes from starting the vehicle to
driving.
• Name at least 5 different types of ENERGY.
Energy Transfer
Sound
(mechanical)
Thermal
Electrical
Mechanical
Chemical
Light
(Electromagnetic)
Chapter 15.2 –
Energy Conversion and Conservation
• The law of conservation of energy states
that energy cannot be created or destroyed
However…
• Energy can be converted from one form to
another – and in either direction!
– The gravitational potential energy of an
object is converted into the kinetic energy of
motion as the object falls
– The BEGINNING TOTAL of KE + PE EQUALS
the ENDING TOTAL of KE + PE
How was energy converted or conserved?
How was energy converted or conserved?
How was energy converted or conserved?
How was energy converted or conserved?
Energy and Mass
2
E=MC
• Einstein’s equation
shows that ENERGY and
MASS are equivalent
and can be converted
into each other
• E=energy
• M = mass
• C = speed of light (3 x 108 m/s)
Energy and Mass
2
E=MC
• In other words, Energy is
released as matter is
destroyed and Matter can
be created from Energy
• Because the square of the speed of
light is a very large figure: even a
small chunk of matter can produce a
large amount of energy!
Your Turn…
Think of an example from everyday life
where potential energy is transformed
into kinetic energy, or vice versa.
Draw a diagram that illustrates the
transformation, using the interactive
activity as an example. Then describe the
transformation.
For example:
When I carry a sled to the top of a snowy
hill, the potential energy of the sled
increases. As I stand with my sled at the
top of the hill, the kinetic energy is zero
and the potential energy is at its
maximum. As I slide down the hill, the
potential energy of the sled decreases
and its kinetic energy increases.
• Energy Skate park
• Energy in a Roller Coaster
The Heat is
ON…
Earth’s Heating Systems
•HEAT transfer is the movement of energy
from a warmer object to a cooler object is
called heat transfer
•Heat is ALWAYS transferred from a warmer
substance to a cooler substance
•There are three types of heat transfer:
– Radiation
– Conduction
– Convection
Three types of HEAT transfer
• Radiation
– The transfer of energy through
EMPTY SPACE
– No direct contact between a heat
source and the object
EX:
Sunlight warms
the Earth’s
surface
Three types of HEAT transfer
• Conduction
– Direct contact of
particles of matter
– Heated particles of a
substance transfer
heat to other
particles through
direct contact
• EX: Metal rod heats
up when held in a
flame source
Three types of HEAT transfer
• Convection
– Transfer of heat by
the movement of
heated fluid
– Fluids include
liquids and gases
– Heated particles of
a fluid begin to
flow, transferring
heat energy from
one part of the fluid
to another
• EX: Pot of soup
Density and Convection
• Differences in temperature and density
cause movement within the fluid
• Heated particles move faster and
spread apart – substance is LESS
DENSE
• When fluid cools particles move closer
together and DENSITY INCREASES
• The flow that transfers heat within a
fluid is called a CONVECTION CURRENT
Energy Resources
Energy Resources
Non - Renewable
• Fossil fuels
–oil
–natural gas
–coal
• uranium
Renewable
• Hydroelectric
• Solar
• Geothermal
• Wind
• Biomass
• Nuclear fusion
???
Alternative Energy
Presentation
ESSENTIAL ITEMS TO INCLUDE:
•
•
•
•
Where does it come from or how is it made?
Advantages (use, production, waste)
Disadvantages (use, production, waste)
Costs (immediate or start-up as well as long
term costs)
• Current usage in the US. How has it changed
in your lifetime?
• What is the future for this type of energy?
ENERGY Test
Formula List
Gravitational Potential Energy
GPE = m*g*h
Force - 2nd Law
Kinetic Energy
KE = ½ mv2