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  • Nonrenewable Energy - Education
    Nonrenewable energy comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes Most nonrenewable energy sources are fossil fuels: coal, petroleum, and natural gas Carbon is the main element in fossil fuels For this reason, the time period that fossil fuels formed (about 360-300 million years ago) is called the Carboniferous Period
  • Nonrenewable Resources - Education
    Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs
  • Renewable Resources - National Geographic Society
    Image Renewable Resources Geothermal power is a form of renewable energy created by powering electrical generators with the heat of the earth and naturally occurring subterranean hot water reservoirs
  • Renewable Energy Explained - Education
    In any discussion about climate change, renewable energy usually tops the list of changes the world can implement to stave off the worst effects of rising temperatures That's because renewable energy sources, such as solar and wind, don't emit carbon dioxide and other greenhouse gases that contribute to global warming Clean energy has far more to recommend it than just being "green "
  • Coal - Education | National Geographic Society
    Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning) Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel in the United States
  • Renewable Energy - Education
    Renewable energy is energy that does not get used up The wind, the sun, and Earth are sources of renewable energy Solar Energy Solar energy comes from the sun There are two types: active solar energy and passive solar energy Active solar energy uses special technology to capture the sun's rays
  • Renewable Energy - Education
    The wind, the sun, and Earth are sources of renewable energy These energy sources naturally renew, or replenish themselves Wind, sunlight, and the planet have energy that transforms in ways we can see and feel
  • Energy Transfers and Transformations - Education
    Energy cannot be created or destroyed, meaning that the total amount of energy in the universe has always been and will always be constant However, this does not mean that energy is immutable; it can change form and even transfer between objects A common example of energy transfer that we see in everyday life is the transfer of kinetic energy —the energy associated with motion—from one
  • Resource Types - Education
    A resource is a physical material that humans need and value such as land, air, and water Resources are characterized as renewable or nonrenewable; a renewable resource can replenish itself at the rate it is used, while a nonrenewable resource has a limited supply Renewable resources include timber, wind, and solar while nonrenewable resources include coal and natural gas
  • Desert Biome - Education
    The desert biome covers about one-fifth of Earth’s surface This biome has a layer of soil that can either be sandy, gravelly, or stony, depending on the type of desert Deserts usually get at most 50 centimeters (20 inches) of rainfall a year, and the organisms that live in deserts are adapted to this extremely dry climate Plants in deserts have adaptations to conserve water





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