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Which bodies float on water?
EduBook Organización
- 1737 visitas
Cork is a material that floats on water. Other substances, such as stones, sink. This phenomenon is related to the different densities of the materials. If the density of an object is less than the…
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The extinction of the dinosaurs
EduBook Organización
- 1737 visitas
In 1980, American scientists proposed that the cause of the extinction of the dinosaurs, which occurred about 65 million years ago, was the result of a meteorite hitting Earth. According to this…
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Answer. Atmospheric phenomena 2
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- 1730 visitas
Do sea breezes move from the sea to the coast, or the other way around? What about land breezes?
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Match. Weather terms
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- 1742 visitas
Match each word or phrase with the correct characteristics or factor: wind hot air clouds cirrus and cumulus troposphere and stratosphere car and plane engines barometer hurricane atmospheric pressure…
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Answer. The atmosphere 3
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- 1736 visitas
How does the air become polluted? What can be done to avoid air pollution?
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Reflect. Water 4
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- 1746 visitas
What happens if you put a piece of ice in a glass of water and then you try to push it to the bottom of the glass? Why?
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Initial evaluation 3 - The Earth, a Living Planet
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- 1 lo usan
- 1551 visitas
Decide which function (nutrition, interaction or reproduction) each definition describes: The way living things obtain energy. Function of The way living things make copies of themselves. Function of…
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Look. Life 550 million years ago
EduBook Organización
- 1743 visitas
Describe the animal life shown in the picture. Which of the animals in the picture are similar to animals living today? Some organisms in the picture have disappeared. What factors could have caused…
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Calculate. Measuring living things
EduBook Organización
- 1737 visitas
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…