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Calculate. Minerals (2)
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Manganese is a mineral formed at the bottom of the sea. It is found in the form of different sized nodules. If we know that each nodule grows by 2 mm every million years, how long will it take a nodule…
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What some types of minerals are like - The Earth's Crust
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Precipitates Many minerals are formed by precipitation. This occurs when water evaporates or when dissolved substances stop being soluble and fall to the bottom of the sedimentary basin. Some of these…
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Unit 11: Heat and temperature
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Air-tight (adj): completely closed so that air cannot get in or out. alcohol (n): a colourless inflammable liquid used as a solvent and in thermometers. anomalous (adj): different from what is expected.…
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Mountain landscapes
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Mountain landscapes Mountains are high elevations of land. A mountain has three parts: The peak is the highest part of the mountain. The foot is the bottom part of the mountain. The slopes are the parts…
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Unit 2: The representation of the Earth: maps
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Cartography (n): the process of making maps. conventional signs (n): symbols or colours used to represent the different elements on maps. coordinates (n): geographical coordinates are a system used to…
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Blood circulation (II)
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The heart The heart is the organ that pumps blood to all the cells in our body. It is about the size of a closed fist. Its walls are made of muscle tissue. The heart contains four chambers: The two top…
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Did you know...
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Colonial society was structured according to race. Those born in Spain and their descendants in America (Creole people) were at the top of the social pyramid. There was also a rich bourgeoisie dedicated…
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The Middle Ages
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Castles and churches In the Middle Ages, the most important buildings were castles and churches. There are still many castles and churches from the Middle Ages in Spain today. We call these old…
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Food chains and food webs
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To study an ecosystem, it is important to know how living things interact with each other. The most important interaction between the living things in an ecosystem occurs in the food chain. A food chain…
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Let's learn how to... - The natural environment
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Draw a food web What do we do? You are going to draw the food web of the forest in the picture below. Draw the producers at the bottom of the food web. Then draw the primary consumers above, and finally…
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