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Think about it. Manifestations of the Earth's internal energy
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Remember what you have studied in this section and answer the questions: Why do tectonic plates move? Explain how they move in relation to each other. Why does material from the deepest part of the…
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The greenhouse effect
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The solar radiation that reaches the Earth's surface is reflected by the Earth. It then rebounds and heats the atmosphere. This phenomenon is essential for life. Without it, temperatures would be…
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Average annual rainfall
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Precipitation maps have imaginary lines called isohyets. The isohyets connect places on the Earth's surface with the same amount of precipitation. The map shows how: Precipitation is abundant in…
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Complete. What is the geosphere made up of?
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Complete this text with the correct words: The geosphere is made up of which are natural materials. They are usually and dense, and made up of various substances called . The geosphere has rocks on the…
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Learn... Extracting minerals
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Some minerals of economic interest are scarce. Sometimes they appear in concentrated amounts in the Earth's crust. These are called mineral deposits. The places where humans extract mineral deposits…
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Final Autoevaluation 9.08 - Motion and forces
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Answer true or false: Friction is a type of force. Friction is the force between an object and the surface on which the object moves. The effect of friction is equal to the movement. The friction value…
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Force and pressure
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6.1. The efficiency of force When a force is applied, the effect caused depends not only on the magnitude of the force, but also on the surface area to which it is applied. The relationship between…
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Final self-evaluation 7 - The Earth and the Moon
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Complete the sentences with the missing words: The Moon is the Earth's only . The Moon's surface has large caused by the impact of meteorites. The Moon has large areas of lava known as . A moon…
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Learn. The different types of respiration - Animal nutrition
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Diffusion In unicellular organisms, like the amoeba, respiratory gases are exchanged across the whole surface of the body. These gases then cross the cell membranes by diffusion. Tracheal respiration…
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The sense organs adapt
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2.1. The sense organs The sense organs receive stimuli from the environment. They are usually found close to the surface at the front of the body. An animal's sense organs determine how it perceives…
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