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Learn... Distances in the Universe
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The Universe is vast. For this reason, special units are needed to measure these tremendous distances. Astronomers basically use two types of units: the astronomical unit and the light year. The…
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Final evaluation 2 - The Atmosphere
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List the names of the five main parts of the atmosphere. Explain how air density and temperature change with the increase in altitude.
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The water cycle
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3.1. Always the same water Water follows a closed cycle. It is constantly changing its state and location, but the amount of water on Earth does not change. This limited but stable amount of water gets…
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Match. Properties of water
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Link the following everyday phenomena with the most common properties of water: If we leave a full bottle of water in the freezer, it will break. Water from rivers that have flowed through saline…
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Final evaluation 8 - The Hydrosphere
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What is the difference between a water purification plant and a sewage treatment plant?
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Final evaluation 6 - The Diversity of Life
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List three illnesses that are caused by bacteria. How do we fight these illnesses?
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Answer. Mosses and ferns 2.4
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Explain how both mosses and ferns reproduce.
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Answer. Nematodes, annelids and molluscs 2.1
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What is the main characteristic of nematodes?
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Reflect. The physical environment and society
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What are the continents? Name the continents on our planet?