geo
·Corrasion – Wearing away of the river bed and banks by the load hitting against them.
·Attrition – Wearing down of the load as the rocks and pebbles hit the river bed and each other.
·Hydraulic Action – Breaking away of river bed and banks by the sheer force of the water getting into small cracks.
·Chemical Action (Corrosion) – Water dissolves minerals from the rocks and washes them away.
·Traction – Quite large stones can be rolled or dragged along the river bed by the force of the water.
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Biodiversity: The biological diversity. It is the variety of all forms of life on earth – plants, animals and microorganisms. It refers to the species (species diversity) variations within species (genetic diversity), and interdependence within species (ecosystem diversity) and habitat diversity.Importance:Plant biodiversity ensures a varied and interesting diet (more fruits, nuts, vegetables, etc make our diet more interesting and healthier).Greater biodiversity ensures sustainability for all
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What materials are named ‘high entropy alloys’, explain the origin this name and indicate their specific properties basing on a selected example.
High-entropy alloys (HEAs) are substances that are constructed with equal or nearly equal quantities of five or more metals. These alloys are currently the focus of significant attention in materials science and engineering because they have potentially desirable properties.
Furthermore, research indicates that some HEAs have considerably better strength-
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Water supply depends on factors in the water cycle:Rates of rainfall, Evaporation, The use of water by plants (transpiration), River, Groundwater flows. 1% of water is available to use, most of it is trap in glaciers and ice caps. It is estimated that the amount of water supply will decrease in the coming years due to all the water flowing from rivers after evaporation and infiltration into the ground.The water supply is not evenly distributed across the globe.Three quarters of the annual rainfall
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