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Interpret. The phases of the Moon 03
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What does the Moon look like from the Earth in the first week of the lunar cycle?
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Answer. The Moon and the Earth 01
EduBook Organización
- 1338 visitas
Why do the Moon's craters never change?
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Meteorites
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- 1331 visitas
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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- 1330 visitas
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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Reflect. Pressure and climate 2
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Is the air pressure at the top of a mountain higher or lower than the air pressure at sea level? Explain your answer.
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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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Answer. Arachnids, myriapods and crustaceans 5.1
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What makes crustaceans' exoskeletons so hard?