"Energy and Sustainable Development" PPT Courseware 2

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"Energy and Sustainable Development" PPT Courseware 2

1. Directionality of energy transfer and energy conversion

Want to discuss

Since energy is conserved, the energy on the earth will not decrease. Why do we need to save energy?

In the process of heat transfer, heat can only be spontaneously transferred from a high-temperature object to a low-temperature object, not the other way around. If you want to transfer heat from a low-temperature object to a high-temperature object, you need to consume other forms of energy.

For example, refrigerators consume electricity.

When a car brakes, due to friction, kinetic energy is converted into the internal energy of the tires, ground and air. This consumed energy can no longer be used to drive the car automatically.

The transformation and transfer of energy are directional, some energy can be utilized, and some cannot.

The energy we can use is limited, so we need to save energy.

2. Impact of energy consumption on the environment

Fossil energy is converted into internal energy through combustion, and a considerable part of the internal energy is not effectively utilized.

Vehicle exhaust causes air pollution and the urban heat island effect.

The large amount of carbon dioxide produced by fuel combustion intensifies the earth's greenhouse effect.

3. Energy and sustainable development

1. Improve energy utilization and reduce environmental damage during energy use.

2. Develop new ideal energy sources

Non-renewable energy:

Fossil energy, nuclear energy and other energy sources will be used less and less.

Renewable Energy:

Solar energy, wind energy, water energy, etc. can be obtained continuously in nature.

Want to discuss

In the energy family, there are wood, coal, oil, natural gas, hydro energy, wind energy, solar energy, nuclear energy, etc. Which ones are non-renewable energy? What are renewable energy sources?

Which do you think wind energy, solar energy, nuclear energy, and other possible energy sources you think of may become the ideal energy source of the future, and why?

Keywords: Energy and Sustainable Development Teaching Courseware, New People's Education Edition Ninth Grade Physics PPT Courseware, Ninth Grade Physics Slide Courseware Download, Energy and Sustainable Development PPT Courseware Download, .ppt format

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Update Time: 2024-09-07

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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