Fossil Fuels and Electricity Production

1. The device used to create electricity from wind is called a ______________.

A turbine is a device that converts the kinetic energy of a moving fluid (such as air) into mechanical energy. In the context of creating electricity from wind, a wind turbine specifically refers to a turbine that is designed to harness the power of the wind and convert it into electrical energy. Therefore, both "turbine" and "wind turbine" are correct answers to the question.

Explanation

A turbine is a device that converts the kinetic energy of a moving fluid (such as air) into mechanical energy. In the context of creating electricity from wind, a wind turbine specifically refers to a turbine that is designed to harness the power of the wind and convert it into electrical energy. Therefore, both "turbine" and "wind turbine" are correct answers to the question.

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2. The process of creating an electric current by adjusting a magnetic field is called _______________.

Electromagnetic induction refers to the process of generating an electric current by changing the magnetic field strength or by moving a conductor through a magnetic field. This phenomenon was first discovered by Michael Faraday in the 19th century and is the fundamental principle behind the operation of generators and transformers. The changing magnetic field induces an electric field, which in turn causes the movement of electrons and the creation of an electric current.

Explanation

Electromagnetic induction refers to the process of generating an electric current by changing the magnetic field strength or by moving a conductor through a magnetic field. This phenomenon was first discovered by Michael Faraday in the 19th century and is the fundamental principle behind the operation of generators and transformers. The changing magnetic field induces an electric field, which in turn causes the movement of electrons and the creation of an electric current.

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3. The main components needed in electricity production are relative spinning of a wire in a ____________________.

In order to generate electricity, one of the main components required is the relative spinning of a wire in a magnetic field. This is because when a wire moves through a magnetic field, it induces an electric current in the wire due to electromagnetic induction. This current can then be used to power electrical devices. Therefore, the presence of a magnetic field is essential for the production of electricity.

Explanation

In order to generate electricity, one of the main components required is the relative spinning of a wire in a magnetic field. This is because when a wire moves through a magnetic field, it induces an electric current in the wire due to electromagnetic induction. This current can then be used to power electrical devices. Therefore, the presence of a magnetic field is essential for the production of electricity.

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4. What is the total efficiency of the fossil fuel conversion from coal to electricity in terms of percentage?

The total efficiency of the fossil fuel conversion from coal to electricity is 35%, 35 percent, or simply 35. This means that out of the total energy contained in the coal, only 35% is converted into electricity, while the remaining energy is lost as waste heat.

Explanation

The total efficiency of the fossil fuel conversion from coal to electricity is 35%, 35 percent, or simply 35. This means that out of the total energy contained in the coal, only 35% is converted into electricity, while the remaining energy is lost as waste heat.

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5. Match the type of fossil fuel with the correct description.

The first stage of the coal-making process.

The second stage when coal is more compressed by heat and pressure.

The final stage, where coal is the most dense and has a dense energy profile.

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6. Of gasoline, wood, natural gas, and coal, it is the one that has the highest energy content per gram.

Gasoline

Wood

Natural gas

Coal

Natural gas has the highest energy content per gram among gasoline, wood, natural gas, and coal. This is because natural gas is primarily composed of methane, which has a higher energy content compared to the other substances. When burned, natural gas releases a large amount of heat energy, making it a highly efficient fuel source.

Explanation

Natural gas has the highest energy content per gram among gasoline, wood, natural gas, and coal. This is because natural gas is primarily composed of methane, which has a higher energy content compared to the other substances. When burned, natural gas releases a large amount of heat energy, making it a highly efficient fuel source.

7. I plug my kindle touch into the wall to charge it. The type of current coming from the outlet is direct current, or DC.

True

False

The explanation for the answer being False is that the type of current coming from the outlet is alternating current, or AC, not direct current.

Explanation

The explanation for the answer being False is that the type of current coming from the outlet is alternating current, or AC, not direct current.

Fossil Fuels And Electricity Production