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Objective 05/15/2013 No Page . SWBAT recognize the forms of energy through notes, discussion and bookwork. . Jumpstart. In order for matter to change phase ___________ must be either gained or lost.

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Jumpstart

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  1. Objective 05/15/2013 No Page SWBAT recognize the forms of energy through notes, discussion and bookwork. Jumpstart • In order for matter to change phase ___________ must be either gained or lost. • If you have ever lived in a place where it snows, then you know salt is sprinkled on sidewalks and streets. Why? • To melt the snow or ice by lowering the freezing point • Oceans don’t freeze except in extreme polar regions. Why? • Salt water needs to be colder than fresh water; poles are much colder than other regions!

  2. Forms of Energy Packet 14 Page 1 & 2

  3. Packet 14: Types and Sources of Energy, Energy Transformations & Renewable vs. Non-Renewable Energy

  4. Energy Unit Standards • THE STUDENT WILL… • DEMONSTRATE THAT ENERGY CAN BE KINETIC OR POTENTIAL. • INVESTIGATE ENERGY AS A PROPERTY ASSOCIATED WITH MATTER. • DESCRIBE DIFFERENT FORMS OF ENERGY (HEAT, CHEMICAL, LIGHT, ELECTRICITY, MECHANICAL MOTION, SOUND, AND NUCLEAR). • DESCRIBE VARIOUS ENERGY TRANSFERS WITHIN A SYSTEM. • GIVE EXAMPLES OF ENERGY TRANSFORMATIONS. • IDENTIFY TYPES AND SOURCES OF ENERGY • DISTINGUISH BETWEEN RENEWABLE AND NONRENEWABLE SOURCES OF ENERGY Final Unit Project: Energy Public Service Announcement We will discuss more about this tomorrow…

  5. Nature of Energy • Energy is all around you! • You can hear energy as sound • You can see energy as light • You can feel it as heat

  6. Nature of Energy • Living organisms need energy for growth and movement • You use energy when you: • hit a baseball • lift your book bag • compress a spring

  7. Nature of Energy • Energy is involved when: • a bird flies • fireworks explodes • water falls from a waterfall • electricity flows in a wire

  8. Forms of Energy- Packet 14, Page 1 • 7.1- TSW USE AN OPERATIONAL DEFINITION OF ENERGY. • What is energy that it can be involved in so many different activities? • Energy- the ability to do work • Unit J (Joules) • Work- exerts a force over a distance to move an object • If an object or organism does work, the object or organism uses energy • If an object has work done on it, the object gains energy

  9. Forms of Energy 7.4- THE STUDENT WILL DESCRIBE DIFFERENT FORMS OF ENERGY (HEAT, CHEMICAL, LIGHT, ELECTRICITY, MECHANICAL MOTION, SOUND, AND NUCLEAR) • Thermal (Heat)- measures total motion of the atoms; thermal energy increases = particles move faster (more Kinetic Energy) and it makes the object feel warmer • Produced by friction, causes phase/temperature changes • Ex. When the thermal energy of ice cream increases, it melts

  10. Forms of Energy 2. Chemical- PE stored in chemical bonds that hold chemical compounds together; when bonds are broken, energy is released • Ex. Stored in food, fuel (gas/ petroleum), match used to light a candle

  11. 3. Electromagnetic- forms of light • Electromagnetic spectrum- gamma, x-rays, radio, infrared, ultraviolet, visible, microwaves • Electromagnetic energy carries your cell phone messages to your phone (microwaves)

  12. Forms of Energy 4. Nuclear- PE stored in the nucleus of an atom is the source of nuclear energy; the most concentrated form of energy • Fission- When the nucleus splits, nuclear energy is released in the form of heat energy and light energy. • Fusion- Nuclear energy is also released when nuclei collide at high speeds and join (fuse). • The sun’s energy is produced from a nuclear fusion reaction in which hydrogen nuclei fuse to form helium nuclei.

  13. 5. Mechanical- energy associated with motion or position; occurs as: • Kinetic Energy- energy of motion • Potential Energy- stored energy • Examples: • When you kick a football, you give it mechanical energy to move • When you roll a bowling ball, you give it mechanical energy, which is transferred to the pins! • School bus, jumping frog

  14. Types of Energy 6. Electrical- Moving electric charges produce electricity; electrical energy is the energy carried • Ex. When you get a shock from a metal doorknob, power lines (to run radios, lights, computers, etc.)

  15. The Law of Conservation of Energy • Law of Conservation of Energy- Energy cannot be created or destroyed, only transformed from one type to another • If energy seems to disappear, then scientists look for it – leading to many important discoveries. • In 1905, Albert Einstein said that mass and energy can be converted into each other • He showed that if matter is destroyed, energy is created, and if energy is destroyed mass is created. • e = mc2

  16. Only 20% of the world's people live in industrialized countries, yet they consume more than 66% of the planet's resources. With less than 5% of global population, the United States accounts for about 25% of global consumption. Did you know that a child born in an industrialized country will consume and pollute more over his or her lifetime than 30-50 children born in developing countries? 5/16/2013

  17. 7.5- TSW DESCRIBE VARIOUS ENERGY TRANSFERS WITHIN A SYSTEM. • 7.7- TSW GIVE EXAMPLES OF ENERGY TRANSFORMATIONS. Energy Transformations- Pg 3 • Most energy can be converted into other types of energy Electromagnetic Chemical Chemical Mechanical (KE) Chemical Mechanical (KE) Electrical Thermal

  18. Energy Transformations Solar panels Plants growing • Electromagnetic electrical • Sun’s energy electricity • Electromagnetic chemical • Sun’s energy “plant food” Wind turbines Electric motor • Mechanical energy(ME) electrical • Turbine spins electricity • Electrical ME (KE) • Electricity spinning motor

  19. Homework • 7.12- TSW IDENTIFY THE INPUTS, TRANSFORMATIONS, AND OUTPUTS OF ENERGY IN A SYSTEM. • Packet 14, Page 2 & 3- “Forms of Energy” and “Energy Transformations” Worksheet- both sides!

  20. 7.14- TSW DISTINGUISH BETWEEN RENEWABLE AND NONRENEWABLE SOURCES OF ENERGY. • Renewable resource- natural resource that is used at a rate slower than the rate at which it regenerates • Non-renewable resource- natural resource that cannot be replaced if used up

  21. Sources of Energy- Pkt 14, Pg 4 • 7.13- TSW IDENTIFY TYPES AND SOURCES OF ENERGY. • Solar energy- renewable; energy from the sun in the form of heat and light, converted by parabolic dishes and photovoltaic cells • Wind energy- renewable; conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity • Geothermal power- renewable; (from the Greek roots geo, meaning earth, and thermos, meaning heat) is power extracted from heat stored in the earth

  22. Sources of Energy • Biomass/biofuel- renewable; biological material derived from living, or recently living plant matter, such as wood, solid waste, landfill gas, biogas, and ethanol fuels; burned to generate electricity • “Clean” coal (fossil fuel) technology- non-renewable; technology that may reduce emissions of carbon dioxide (CO2) (and greenhouse gases) that arise from the burning of coal for electrical power; typically in reference to carbon capture and storage, which pumps and stores CO2 emissions underground • Nuclear power- non-renewable; produced from controlled (i.e., non-explosive) nuclear reactions; released by the splitting (fission) or merging together (fusion) of the nuclei of atom(s)

  23. Sources of Energy • Hydroelectricity- renewable; (Hoover Dam!) the production of electrical power through the use of the gravitational force of falling or flowing water (hydropower) • Tidal/wave/ocean power- renewable; a form of hydropower that converts the energy of tides or ocean surface waves into electricity or other useful forms of power • Hydrogen fuel cell- renewable; an alternative fuel vehicle that uses hydrogen as its onboard fuel for motive power; uses hydrogen as its fuel and oxygen (usually from air) as its oxidant

  24. Part I: General Energy Resource Research- Page 6 7.3- TSW INVESTIGATE ENERGY AS A PROPERTY ASSOCIATED WITH MATTER. • In groups, in the classroom, you will research the following different sources of energy : • Solar energy • Wind energy • Geothermal power • Biomass/biofuel • “Clean” coal (fossil fuel) technology • Nuclear power • Hydroelectricity • Tidal/wave/ocean • General Energy Source Research- in class using packets in manila folders and library books • Nevada Energy Sources • In groups of 1-3, you will research • power

  25. Public Service Announcement (PSA) • What: non-commercial advertisement broadcast • on radio or television, for the public interest • Why: Intended to modify public attitudes by raising awareness, informing, or educating the public about specific issues • Common topics: health and safety • Example: “Above the Influence” & “My Anti-Drug”

  26. Watch the following PSAs. As you watch, think and then write about the following: • What is the message of the PSA? • Who is the target audience? • Is this PSA effective? • What makes this PSA effective or ineffective? • Train • Influence

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