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Answer. Matter: volume, mass and density 2.1
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Look at this image of an iceberg. Why does it float in the water?
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Calculate. Distances in the Universe 4
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If the distance from the Earth to the Moon is 1.25 light seconds, how many kilometres are there between them? km.
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Answer. The Solar System 3.6
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What are dwarf planets? Where are they in the Solar System?
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About our planet
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2.1. The earth's layers The Earth is a rocky, almost spherical planet. Its radius is 6373 kilometres. There is a lot of activity inside the Earth. This activity is evident in the crust in the form…
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Final self-evaluation 4 - The Earth and the Moon
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Match each characteristic with one of the Earth's layers: The layer where living things are found. The gaseous layer that surround the Earth. The layer made of liquid. The layer where earthquakes occur.
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The water cycle in nature
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The water cycle is a closed cycle that has several stages (as seen in the diagram). Here we will start with the water evaporation stage. Why would this cycle not occur without the Sun? Where does the…
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Answer. The Earth's crust 1.4
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What are the most abundant geochemical elements? Where are the found?
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Choose. Classification of living things
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Decide what type of organisms the following living things are. cyanobacteria euglena paramecium Penicillium notatum pine Ulva lactuca
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Calculate. Measuring living things
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To measure living things as small as bacteria or viruses, we use nanometres (a billionth of a metre) and micrometres (a miliionth of a metre). What fraction of a millimetre are a micrometre and a…