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Hazards caused by human activity
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3.1. Technological hazards Sometimes, human technology causes problems for the environment. Nuclear power stations are carefully controlled and are generally quite safe, but an accident could cause very…
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We use energy
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Electricity We use electricity every day in homes, offices, schools and factories. We get electricity from: Hydroelectric power stations, which convert water energy into electricity. Thermal power…
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Correct. Summarising concepts
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Correct the sentences below: The acidity of the soil is determined by the size of its particles that affects its ability to retain water. Irrigated farming only uses rainwater. Subsistence livestock…
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Complete. Fish
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Complete the sentences with the missing words: Fish breathe through . Fish reproduce through external fertilisation ( fish) or internal fertilisation (viviparous fish). The protects the gills of bony…
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Initial self-evaluation T4 03 - Rivers and seas
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Are the following statements true or false?: Flow is the amount of water that a river carries. A river meanders in its upper course. A river causes more erosion in its lower course. The materials…
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Resolución de problemas - Operacións con fraccións
EduBook Organización
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Que duración ten un cuarto de partido de baloncesto en Europa? E na NBA dos Estados Unidos? Canto dura cada parte dun partido de fútbol? E cada parte dun partido de hóckey sobre xeo? Cal é a…
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Answer true or false. Correct the false sentences in your notebook
EduBook Organización
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Answer true or false. Correct the false sentences in your notebook: There are three kinds of natural landscapes: agricultural, industrial and urban. → Urban landscapes have man-made features, like…
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Final Autoevaluation 1.07 - Plant nutrition
EduBook Organización
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Answer true and false: The raw sap consists of water and mineral salts. The xylem is a tissue shaped like hollow tubes and is made up of dead cells. The elaborated sap is absorbed through the root…
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True / false. External geological forces
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Are these sentences true or false? The main external geological forces are wind, fire and snow. There are five phases of external geological action. The erosion of the Earth's surface occurs in this…
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Complete these sentences
EduBook Organización
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Complete these sentences: Wood, coal and oil are sources of heat. Light cannot pass through objects. We use to measure temperature. When we heat an object, it . Water is the only substance which expands…
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