Kinds of Energy NOTE: If you want to learn about Energy in terms of Renewable and Non-renewable Energy, please select an option below: What is energy? Look around you. Is anything moving? Can you hear, see or feel anything? Sure... this is because something is making something happen, and most probably, there is some power at work. Look at the sketch below to see an example of things working, moving, or happening... with energy. Energy moves cars along the roads and makes aeroplanes fly. KINDS OF ENERGY With the above explanation in mind, let us learn more. Energy can be (is) stored or transferred from place to place, or object to object in different ways.
The Law of Conservation of Energy As of July 1, 2013 ThinkQuest has been discontinued. We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism. Parents - For supporting the use of technology not only as an instrument of learning, but as a means of creating knowledge. We encourage everyone to continue to “Think, Create and Collaborate,” unleashing the power of technology to teach, share, and inspire. Best wishes, The Oracle Education Foundation The Energy Story - Introduction Energy is one of the most fundamental parts of our universe. We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television. Energy from the sun gives us light during the day. Everything we do is connected to energy in one form or another. Energy is defined as: "the ability to do work." When we eat, our bodies transform the energy stored in the food into energy to do work. Cars, planes, light bulbs, boats and machinery also transform energy into work. Work means moving something, lifting something, warming something, lighting something. There are many sources of energy. The forms of energy we will look at include: Electricity Biomass Energy - energy from plants Geothermal Energy Fossil Fuels - Coal, Oil and Natural Gas Hydro Power and Ocean Energy Nuclear Energy Solar Energy Wind Energy Transportation Energy
Law of Conservation of Energy, Energy, Force and motion, Science Year 9 Introduction The Law of Conservation of Energy states that energy cannot be created or destroyed, just transformed from one form to another. These forms can include kinetic and potential energy as well as light, heat and sound. The effect of friction Imagine a bouncing ball. See Image 1 Judging by the fact that energy cannot be created or destroyed, it seems reasonable that the ball should continue bouncing forever. Another example is driving in a car. See Image 2 The term efficiency can be used to describe how much energy is lost through friction.
Biomess Energy | A Student's Guide to Global Climate Change Biomass is a fancy name for material from plants and animals. Some kinds of biomass can be burned to produce energy. One common example is wood. Biomass contains stored energy. Burning biomass releases carbon dioxide. Many different kinds of biomass, such as wood chips, corn, and some types of garbage, are used to produce electricity. Energy from trees. Top of page energy - definition of energy by the Free Online Dictionary energy [ˈenədʒɪ] A. N ( gen ) → energía f ; (= strength ) → vigor m electrical/atomic/solar energy → energía f eléctrica/atómica/solar Secretary (of State) for Energy → Secretario/a m/f (de Estado)de Energía Minister of Energy → Ministro/a m/f de Energía Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005 energy [ˈɛnə r dʒi] n (= strength, stamina ) [ person ] → énergie f energy energy : energy balance n (of body) → Energiehaushalt m energy efficiency n → Energieeffizienz f energy-efficient adj → energieeffizient energy-intensive adj → energieintensiv energy supplies pl → Energievorräte pl Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. energy ( ˈenədʒi ) – plural ˈenergies – noun 1. the ability to act, or the habit of acting, strongly and vigorously. ˌenerˈgetic ( -ˈdʒetik ) adjective ˌenerˈgetically adverb en·er·gy
What is Kinetic Energy? Kinetic Energy All moving things have kinetic energy. It is energy possessed by an object due to its' motion or movement. These include very large things, like planets, and very small ones, like atoms. The heavier a thing is, and the faster it moves, the more kinetic energy it has. Now let's see this illustration below. Let us say both balls will fall into the bucket of water. You will notice that the smaller ball makes a little splash as it falls into the bucket. Note the following: 1. Let's see another classic example. Other examples of Kinetic Energy include a moving car, moving wheel, and a moving arrow. Click to see a video example of kinetic energy in use. Can you give your own examples?
KS3 Bitesize Science - Energy transfer and storage : Revision, Page 2 Kids Zone: Power Sources Power Sources There are many types of power sources. The most popular power source is fossil fuels (coal, oil, gas). Although fossil fuel is the most common power source, it is not the only one. While these power sources are used to produce most of the earth's electricity, it is important to remember that some of them are non-renewable, which means that they can not be naturally restored in a short period if time. Renewable energy is a source of energy that can never be exhausted. Power Basic Terminology and Concepts Power The quantity work has to do with a force causing a displacement. Work has nothing to do with the amount of time that this force acts to cause the displacement. Sometimes, the work is done very quickly and other times the work is done rather slowly. Power is the rate at which work is done. The standard metric unit of power is the Watt . Most machines are designed and built to do work on objects. machine. A person is also a machine that has a power rating . Suppose that Ben Pumpiniron elevates his 80-kg body up the 2.0-meter stairwell in 1.8 seconds. Ben's power rating is 871 Watts. The expression for power is work/time. This new equation for power reveals that a powerful machine is both strong (big force) and fast (big velocity). Check Your Understanding Use your understanding of work and power to answer the following questions. 1. 2. 3. 4. 5. 6.
Kids Zone: Types of Energy Just like there are different forms of electricity, there are different types of energy too. The two main types of energy are: Kinetic Energy Potential Energy Kinetic Energy is energy that is in motion. Energy is measured in the amount of "work" it does. Energy can change from one form to another. There are other types of energy as well: Mechanical Energy is the energy of motion that does the work. 10 Things You Can Do to Save the Ocean 1. Mind Your Carbon Footprint and Reduce Energy Consumption Reduce the effects of climate change on the ocean by leaving the car at home when you can and being conscious of your energy use at home and work. A few things you can do to get started today: Switch to compact fluorescent light bulbs, take the stairs, and bundle up or use a fan to avoid oversetting your thermostat. 2. Global fish populations are rapidly being depleted due to demand, loss of habitat, and unsustainable fishing practices. 3. Plastics that end up as ocean debris contribute to habitat destruction and entangle and kill tens of thousands of marine animals each year. 4. Whether you enjoy diving, surfing, or relaxing on the beach, always clean up after yourself. 5. Certain products contribute to the harming of fragile coral reefs and marine populations. 6. Read pet food labels and consider seafood sustainability when choosing a diet for your pet. 7. 8. 9. 10.
Ocean Power - Is Ocean Power a Viable Energy Source? Dear EarthTalk: Alternative energy sources like wind power, hydrogen and biofuels are getting a lot of headlines these days, but what about efforts to generate electricity from the ocean’s waves?-- Tina Cook, Naples, FL As any board or body surfer will tell you, the ocean’s tidal currents pack considerable wallop. Is Ocean Power an Option? According to Energy Quest, an educational website of the California Energy Commission, the sea can be harnessed for energy in three basic ways: using wave power, using tidal power, and using ocean water temperature variations in a process called “ocean thermal energy conversion”. Ocean Wave Power In harnessing wave power, the back-and-forth or up-and-down movement of waves can be captured, for example, to force air in and out of a chamber to drive a piston or spin a turbine that can power a generator. What’s Being Done with Ocean Power? Several companies now work at the cutting edge of ocean power technology. GOT AN ENVIRONMENTAL QUESTION?