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Transcript of Energy Prezi
Resources Connections Nonrenewable
Resources The Product Energy Resources Is used much faster than it can be replaced.
We could run out
Natural resources that cannot be replaced in nature
Most of the energy comes from fossil fuel.
Examples: Fossil Fuels (coal, petroleum, natural gas) diamonds, metals, other minerals **** Energy that have formed over millions of year from the decay of ancient plants and animals.
Examples: coal, petroleum, natural gas, Fossil fuels * Is a solid that is formed from decayed plants millions of years ago
Burned in many power plants to boil water
A spinning turbine turns a generator, which changes ______________ Energy to electrical energy.
21% of the US Energy Source * Coal Liquid fossil fuel known as crude oil.
made from ancient sea organisms.
Burned in car engines, to heat homes.
Burned to create electrical energy
37% of the US Energy Source Petroleum Found with petroleum
Used in stoves, furnaces, water heaters, clothes dryers, and other appliances.
Burned to create electrical energy
25% Natural Gas of US Energy Source Natural Gas Produces a large amount of energy Advantages of Fossil Fuels * Cause pollution= unwanted materials into environment
Burning=Air pollution, releases CO2
Coal mining= damage land and pollute water supplies
Drilling oil= disturbs habitats, can have spills Disadvantages of Fossil Fuels * Energy stored in the nucleus of an atoms
Nuclear power plants produce electricity, and use uranium (nonrenewable) as fuel
No air pollution
Radioactive materials could be released into the environment. Very harmful to humans and other living things.
9% of US Energy Source Nuclear Energy * Can be replaced as it is used or cannot be used up
Types: solar, wind, hydropower, biomass, geothermal
Air, freshwater, soil, living things, and sunlight Renewable Energy Sources * Energy from the sun
Collect to produce heat and electricity
Types: Solar panels, photovoltaic cell, solar batteries, solar reflector
Less than 1% of US Energy Source Solar * Solar cell
Can change light energy into electricity
Require sunlight so during the night they use a power company grid.
Some buildings have solar batteries that store the energy during the day and use it at night. Photovoltaic cell Solar panels in an open area that collect sunlight
Solar reflector reflects and focuses sunlight into a pipe. The pipe becomes heated, they energy is used to turn water to steam. Solar panels/reflectors Advantages
does not create pollution or use nonrenewable fuels
Will not run out
Provides more energy than people need
Solar panels are expensive Solar Energy * Moving air to turn the blades of windmills or wind turbines
Wind farms are area that use large number of wind turbines to produce energy
Less than 1% of US Energy Source Wind energy Advantages
Does not cause pollution
Does not contribute to global warming
Turbines are noisy
Birds and Bats have been struck & killed but the blades Wind energy Moving water
Water moves turbines which move electric generator, produce electricity
A waterfall is a good location to place a hydroelectric power plant because of the large. Other places must have a dam
3% of US Energy Source Hydropower Advantages
Does not create pollution
Only available near a large river
Creating a dam causes floods and destroyes habitats. Hydropower Material from living things
burning plant material (compost)
Fuel= ethanol, made of crops such as corn
4% of US Energy Source Biomass Advantages
Reduce the amount of gasoline
Releases carbon dioxide
Food sources from people and animals Biomass Heat energy from inside Earth
Geo= Earth; Thermal=heat
Uses volcanoes, hot springs, geyser
Used to hear roads and sidewalks to keep them free of ice and snow
Location over volcanically active ground
Did you know? In Iceland, nearly 90% of the homes are heated with geothermal energy. Geothermal Air can be cleaned and purified by plants during the process of photosynthesis as they remove carbon dioxide from the air and replace it with oxygen.
The water cycle allows Earth’s water to be used over and over within the environment.
Topsoil is formed to replace soil that has been carried away by wind and water (although new soil forms very slowly).
Trees and other new plants grow to replace those that have been cut down or died.
Animals are born to replace animals that have died. Connections * That natural resources can be depleted or used to the point that they are in effect no longer available.
Conservation involves preventing the loss of a resource by way of thoughtful management of it. Conservation * Freshwater can be depleted because of increased demands for water by increasing population. This results in water not being available or not being sufficient to meet demands.
Soil can be lost because it is left to erode and depletes the land of the fertile topsoil needed for plant growth in that area.
If living resources, such as trees, are removed without being replanted, this can contribute to environmental changes in the land, air, and water in that area that leads to negative consequences. Consequences * As population increases, the need for resources ________________. Human Population * Identify as nonrenewable or renewable
25% Natural Gas
4% Biomass and biofuel
1% Geothermal, solar, wind
Do we use more renewable or nonrenewable? US Energy Use by Source* Reduce= making a decision to not use a resource when there is an alternative
such as walking or riding a bicycle rather than traveling in a car.
Reusing= finding a way to use a resource again without changing it or reprocessing it
such as washing a drinking glass rather than throwing away plastic or Styrofoam.
Recycling= reprocessing a resource so that the materials can be used again as another item,
such as metals, glass or plastics being remade into new metal reduce, reuse, recycle* A. coal
D. biomass Which of the following is a nonrenewable energy resource? A. geothermal energy
C. solar energy
D. biomass Which source of energy depends on moving water? A. petroleum
D. Wind Which of the following does not release carbon dioxide when it is used as an energy resource? A. Enough new coal and oil will form to meet our needs in the near future.
B. In the near future, people will no longer need to conserve fossil fuels
C. Fossil Fuel supplies will decrease, and the cost of fossil fuels will increase
D. Coal will be in short supply, but oil will still be widely available for our use. Which of the following is the most reliable prediction about the future of some nonrenewable energy sources? A. production
D. restoration The wise use of natural resource is called A. It can be used only in areas that have volcanic activity, and these areas are limited
B. It can be used only in areas that receive a great deal of sunlight, and these areas are limited
C. It destroys habitats, so it cannot be used in areas where there is a lot of wildlife.
D. it pollutes the water, so it cannot be used in areas where people live. Why is the use of geothermal energy limited? A. oil and natural gas
B. coal and nuclear energy
C. natural gas and biomass
D. Hydropower and oil Most of the energy is used in the US comes from