AQA (9-1) Topic 10

Which of the following is a sustainable resource?

Complete the following sentences about treating fresh water. In the United Kingdom (UK), rain provides water with low levels of dissolved substances (called [blank_start]fresh[blank_end] water) that collects in the ground and in lakes and rivers. To make this water potable, it must go through these steps: [blank_start]sedimentation[blank_end] - solids sink to the bottom and are removed [blank_start]filtration[blank_end] - fine particles like sand are removed sterilising - microbes are [blank_start]killed[blank_end]

Two new mobile phones have been designed, the one with the most positive LCA has been selected to be manufactured. Select from below a quality that would have contributed towards its selection:

Which of the following are the ways in which fresh water is sterilised?

You need to know about these two methods, and be able to compare them to each other and traditional mining. Complete the sentences below. Phytomining uses [blank_start]plants[blank_end] to absorb metal compounds. The plants are harvested and then [blank_start]burned[blank_end] to produce ash that contains metal compounds. [blank_start]Bioleaching[blank_end] uses bacteria to produce [blank_start]leachate[blank_end] solutions that contain metal compounds.

The reduction in use, reuse, and recycling of materials reduces the use of: 

Put the following statements in the correct order to describe how waste water is treated: A - sedimentation to produce sewage sludge and effluent B - screening and grit removal C - aerobic biological treatment of effluent D - anaerobic digestion of sewage sludge

If supplies of [blank_start]fresh water[blank_end] are limited (such as on an small island), [blank_start]desalination[blank_end] of [blank_start]sea water[blank_end] (high salt levels) may be required. Desalination can be done by [blank_start]distillation[blank_end] or by processes that use membranes such as [blank_start]reverse osmosis[blank_end]. These processes require [blank_start]large[blank_end] amounts of energy.