Методическая разработка по английскому языку по теме Forest fires (Лесные пожары) (Презентация)
презентация к уроку по английскому языку

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Forest fires Выполнил : Учитель иностранных языков Цирулев Д.В.

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The main forest’s enemy Forests have many enemies , but the greatest one is fire.

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What do forest fires mean ? Forest fires are large uncontrolled fires that take place in the forest.

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The main cause of forest fires The main cause of forest fires is human activities. It can be carelessness such as not putting out a campfire or dropping a lit cigarette. It may also be arson, which is setting a fire on purpose and is against the law.

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One step Before After

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Other causes of forest fires There are fires that are started by natural causes for example by lightning or even high temperatures. Other natural causes include volcanic eruptions and sparks from falling rocks.

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How do forest fires spread? Weather — The weather has a large impact on how a fire will spread. Fires are much more likely to start and spread during droughts when the grass and plants are dry. A strong wind can help a fire to spread and move quickly. The high temperature and dry air will also impact how well the fire will spread. Fuel — Fires need fuel to burn. The type of fuel will impact how quickly the fire will spread as well as how intense it will be. In a forest there can be plenty of fuel including trees, leaves, shrubs and grasses. Topography — The topography is the shape and features of the land where the fire is burning. Fire tends to move faster uphill. Fires may spread quickly up steep slopes on the sides of mountains and hills.

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How do firefighters put fires out? Forest fires can be extremely difficult to put out or control. Forest fires can be enormous in size and may quickly change directions. They can move over 7 miles per hour and can jump over natural gaps such as rivers and roads. That being said, modern firefighters are well trained and know how to control forest fires.

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Two main techniques for controlling forest fires T he firebreak T he air drop

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Firebreak Firebreak — One of the best ways to stop a fire is to get rid of the fuel (trees, grass, etc.) that is helping it to burn. Firefighters will often remove the fuel in a long line ahead of the where the fire is advancing. This line is called a firebreak. When the fire reaches the firebreak, it runs out of fuel and stops spreading.

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Air drop Air drop — Sometimes firefighters will use airplanes and helicopters to drop water or special firefighting chemicals on fires from the air. These aircraft can carry thousands of gallons of liquid or gel to drop on hard to reach areas of the fire.

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