Renewable and Nonrenewable Energy Sources

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A set of flashcards covering the key concepts of renewable and non-renewable energy sources as discussed in the lecture.

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23 Terms

1
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What are the two main categories of energy sources on Earth?

Renewable energy sources and nonrenewable energy sources.

2
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What is renewable energy?

Energy that can be replenished or replaced naturally after exploitation.

3
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What is nonrenewable energy?

Energy that cannot be easily replenished once exploited, often taking millions of years to form.

4
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What is an example of a renewable energy source derived from the sun?

Solar energy.

5
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What is the process by which solar energy is converted into chemical energy in plants called?

Photosynthesis.

6
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What are the three types of solar energy conversion processes?

Helio-chemical, Helio-electrical, and Helio-thermal.

7
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How does wind energy generate electricity?

By using the kinetic energy of wind to turn turbines.

8
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What percentage of the Earth's surface is covered by water, a key renewable energy source?

About 71%.

9
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What is geothermal energy?

Energy generated by heat from the Earth's interior.

10
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What is biomass?

Organic materials derived from living organisms that can be used as fuel.

11
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What are the two generations of bioenergy based on the type of biomass used?

First-generation bioenergy from food materials and second-generation bioenergy from non-food sources.

12
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What are fossil fuels formed from?

Remains of ancient plants and animals buried under layers of soil and rock for millions of years.

13
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Name three examples of fossil fuels.

Coal, oil, and natural gas.

14
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What are the advantages of using fossil fuels?

High availability, low cost, reliability, and ability to produce in large quantities.

15
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What is a significant disadvantage of using fossil fuels?

They produce large amounts of CO2 emissions contributing to global warming.

16
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What is nuclear energy derived from?

Nuclear reactions, specifically fission and fusion.

17
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What are the risks associated with nuclear energy?

Potential misuse, radioactive waste, accident risks, and high construction costs.

18
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What is photovoltaic technology in solar power?

It converts sunlight directly into electricity by using solar panels.

19
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How does a wind turbine generate electricity?

By converting the kinetic energy of wind into mechanical energy to turn a generator.

20
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Describe the basic operation of hydropower generation.

It converts the potential energy of flowing water into electrical energy using turbines.

21
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What is a significant feature of biomass energy production processes?

Biomass can be burned directly or converted to biogas for energy.

22
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What are the main types of renewable energy discussed in the video?

Solar energy, wind energy, hydropower, geothermal energy, and biomass.

23
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What is the purpose of a transformer in renewable energy generation?

To adjust the voltage for distribution in the electrical grid.