Các môn học tự chọn: Tiếng dân tộc thiểu số, Ngoại ngữ 2.

One alternative source is nuclear energy. Nuclear energy can provide enough electricity for the world’s needs for hundreds of years, but it can be very dangerous. Another alternative source of energy is geothermal heat, which comes from deep inside the earth. Scientists use this heat to make energy. However, this energy is available only in a few places in the world.

The sun, water, and the wind are other alternative sources of energy. The wind turns windmills and moves sailboats. It is a clean source of energy, and there is lots of it. Unfortunately, if the wind does not blow, there is no wind energy. When water moves from a high place to a lower place, it makes energy. This energy is used to create electricity. Water power gives energy without pollution. However, people have to build dams to use this energy. And as dams cost a lot of money, water energy is expensive.

The sun releases large amounts of energy every day. This energy can be changed into electricity. Many countries use solar energy for their daily life. Solar panels on the roofs of houses can create enough energy to heat or cool an entire house. Solar energy is not only plentiful and infinite but also clean and safe.

LINGUISTIC KNOWLEDGE 

-         Identify 5 alternative sources of energy.

-         Understand advantages and disadvantages of some sources of energy and be aware of saving energy in order to protect environment as well as invent some more modern devices in the future.

COMMUNICATIVE COMPETENCE

-         Use the required language and knowledge to talk about the advantages and disadvantages of using alternative sources of energy.

-         Use the required language and knowledge to talk about the use of alternative sources of energy in the future.

-         Apply the vocabulary relating to some sources of energy in speaking and listening.