Слайд 2
![The energy resources used to generate electricity can be divided into two categories: nonrenewable and renewable.](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-1.jpg)
The energy resources used to generate electricity can be divided
into two categories:
nonrenewable
and
renewable.
Слайд 3
![Nonrenewable resources cannot be increased. We can make these supplies](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-2.jpg)
Nonrenewable resources cannot be increased. We can make these supplies
last longer by using them wisely, but when they are gone we will not have any more.
Слайд 4
![The majority of electricity used in the world is generated](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-3.jpg)
The majority of electricity used in the world is generated
at power plants that burn fossil fuels to heat water and make steam. The steam is highly pressurized and directed at turbine ['tɜbaɪn] blades to make them spin.
Слайд 5
![The three forms of fossil fuels are coal, oil, and](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-4.jpg)
The three forms of fossil fuels are
coal,
oil, and
natural gas.
They are known as fossil fuels because they were formed from the fossilized remains of animals or plants that lived long ago.
Слайд 6
![Nuclear Power Nuclear power plants use the heat from splitting](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-5.jpg)
Nuclear Power
Nuclear power plants use the heat from splitting atoms to
convert water into the steam that turns turbines.
Слайд 7
![Renewable Resources Renewable energy resources can be replenished in a](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-6.jpg)
Renewable Resources
Renewable energy resources can be replenished in a short
period of time, so they will never be all used up. Energy companies all over the world are using renewable resources more and more to generate electricity.
Слайд 8
![Biomass Biomass is organic matter, such as agricultural wastes, and](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-7.jpg)
Biomass
Biomass is organic matter, such as agricultural wastes, and wood chips
and bark left over when lumber is produced. Biomass can be burned to heat water to make steam, which turns a turbine to make electricity. It can also be converted into a gas, which can be burned to do the same thing.
Слайд 9
![Geothermal Energy The word "geothermal" comes from the Greek words](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-8.jpg)
Geothermal Energy
The word "geothermal" comes from the Greek words geo,
for earth, and therme, for heat. So geothermal means "earth heat."
Слайд 10
![Geothermal energy is steam (or hot water that has been](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-9.jpg)
Geothermal energy is steam (or hot water that has been converted
to steam) from deep inside the earth.
Слайд 11
![Hydrogen Hydrogen is a colorless, odorless gas. Hydrogen can be](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-10.jpg)
Hydrogen
Hydrogen is a colorless, odorless gas. Hydrogen can be converted
into electricity through a chemical reaction in a device called a fuel cell. Converting hydrogen into electricity produces no pollution—only water and heat.
Слайд 12
![Hydropower Hydroelectric plants use the power of falling water to](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-11.jpg)
Hydropower
Hydroelectric plants use the power of falling water to turn the
turbines that help generate electricity.
Слайд 13
![Wave power The energy of the ocean's waves and tides](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-12.jpg)
Wave power
The energy of the ocean's waves and tides can
also be used to generate electricity with dams that force ocean water through turbines. This is called tidal energy, or wave power.
Слайд 14
![The world's first wave power station is on the Scottish](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-13.jpg)
The world's first wave power station is on the Scottish
island of Islay. It generates enough electricity for about 400 homes.
Слайд 15
![Solar Energy Solar energy is generated without a turbine or electromagnet..](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-14.jpg)
Solar Energy
Solar energy is generated without a turbine or electromagnet..
Слайд 16
![Special panels of solar cells, or modules, can capture sunlight and convert it directly into electricity](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-15.jpg)
Special panels of solar cells, or modules, can capture sunlight and
convert it directly into electricity
Слайд 17
![Wind Power Wind power is renewable energy that uses the](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/585320/slide-16.jpg)
Wind Power
Wind power is renewable energy that uses the force of
the wind to spin turbines. These spinning turbines generate electricity.