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Answer. The Earth, a planet of the Solar System 01
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Describe the Earth's orbit.
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Minerals (II)
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3.1. Mineral properties Mineralogy is the science of studying minerals. Minerals can be identified according to their physical and chemical properties. The most important properties are density,…
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The origin of coal
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Much of the coal on Earth was formed 300 million years ago, during the Carboniferous period. The coal was formed where the climate was hot and humid, and there were extensive areas covered in lush…
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True/false. Evolution and biodiversity
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Are the following sentences true or false? The term biodiversity includes all the minerals in the Earth's crust. Biological evolution is the gradual transformation of living things in order to adapt…
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End-of-unit activities - The Diversity of Life
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There are more than one and a half million recorded species on Earth, and there are probably several million more to be discovered. Some places have extraordinary diversity. For example, tropical…
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Answer. Echinoderms 3.2
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Echinoderms do not have feet but they can move around the seabed. Explain how these animals move.
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Reflect. Amphibians and water 2.1
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Frogs begin life living in the water and spend their adult life out of the water. How can they breathe in and out of the water?
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Answer. Vertebrates (3)
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Why do fish and amphibians produce many more eggs than reptiles?
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Final self-evaluation 11.01 - The Animal Kingdom (II). Vertebrates
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Complete the text with the missing words: gills – swim – gills – gill slits – bone – oxygen – depths – closes Fish breathe through . Water enters the mouth and passes through the , which…
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Final evaluation 2 - The Animal Kingdom (II). Vertebrates
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Are all fish vegetarian? Do all fish have external reproduction?
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