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Homemade Water Filter - DIY water filtration
V&V Books Vicens Vives Organización
- 1 lo usan
- 1906 visitas
Homemade Water Filter. DIY water filtration. simple design. needed: plastic bottle, sand, gravel. small piece of cotton and activated carbon.
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Find out more
EduBook Organización
- 1867 visitas
Concrete is a mixture of cement, sand, gravel and water. It is used a lot in construction. To shape the concrete, the wet mixture is poured into a wooden or steel frame until it dries and becomes hard…
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Match. The structure of a construction
EduBook Organización
- 1760 visitas
Match the definitions to the terms: They rest on the pillars. They rest on the beams. They are vertical supports which rest on the foundations. The pillars stand on this solid structure. A resistant…
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The origin of coal
EduBook Organización
- 2460 visitas
Much of the coal on Earth was formed 300 million years ago, during the Carboniferous period. The coal was formed where the climate was hot and humid, and there were extensive areas covered in lush…
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What is sedimentation?
EduBook Organización
- 1792 visitas
Sedimentation is the process of depositing materials. It can happen in different ways: Dissolved material in a river may be deposited if the water evaporates. A rock mineral called calcite is formed in…
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