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Answer. Effects of the Moon on the Earth 06
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When does a spring tide occur? And a neap tide?
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Answer. The Moon and the Earth 01
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Why do the Moon's craters never change?
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Meteorites
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Most meteorites burn up quickly in the thermosphere, giving off a bright light, due to friction with the atmosphere. They are known as shooting stars.
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The formation of the Earth atmosphere
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In the beginning, our planet had no atmosphere. As the Earth cooled, various gases were produced. These gases formed the first atmosphere. Oxygen appeared when the first plants began to produce oxygen…
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Answer. The atmosphere 1
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What is the ozone layer? Why is it important for life on Earth?
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Answer. Water on our planet 4
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What percentage of the planet's surface is occupied by water?
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True/false. Metamorphic rocks
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Are the following sentences true or false? Metamorphic rocks come from the solidification of magma. Metamorphism is caused by changes in volume. Marble is formed from metamorphosed clay. In many…
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Answer. The simplest invertebrates 1.1
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Where do sponges live? Explain how they eat.
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Reflect. Characteristics of fish 1.1
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Why do people fishing stay quiet while they fish?
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