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Did you know?
EduBook Organización
- 1867 visitas
Oil comes from the decomposition of the remains of microscopic organisms that lived millions of years ago. Oil is the most important natural material for industrial development. It is used to make…
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Answer. Pure substances and mixtures 02
EduBook Organización
- 1869 visitas
Are ice and water different substances?
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True or false. Measurement
EduBook Organización
- 1871 visitas
Are the following sentences true or false? Volume is an example of magnitude. To measure a magnitude, we compare it with another magnitude. To measure something we have to establish the magnitude of an…
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Calculate. Length and surface area
EduBook Organización
- 1875 visitas
Convert these amounts: 1 mm = dm 1 km = cm 1 m2 = mm2 1 cm2 = mm2 1 dam2 = mm2 1 dam = cm
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About our planet
EduBook Organización
- 1863 visitas
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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The Earth's satellite: the Moon
EduBook Organización
- 1873 visitas
3.1. General characteristics of the moon The Moon is the only natural satellite of the Earth. It is 49 times smaller than our planet. As the Moon does not have an atmosphere, the Sun's rays and the…
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Calculate. Measuring living things
EduBook Organización
- 1870 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…
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Moss and soil
EduBook Organización
- 1872 visitas
Mosses have a very important ecological role. They actively participate in forming the soil and prevent it from eroding and drying up: The rhizoids help to break down rock into small particles. When the…
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Learn. Reading a topographic map
EduBook Organización
- 1862 visitas
Topographic maps show the geographical relief of an area. Below is an example map (scale 1:25000) showing Matamorosa in Cantabria. Map reading guide The map key Look at the map key. Only the important…
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Remember. Supranational organisations 03
EduBook Organización
- 1864 visitas
The UN was founded in 1945, but Spain did not join until 1955. Why wasn't Spain accepted before then?
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