Skills for Study Level 2 Teacher's Book - Cambridge University Press

3dSuggested answers1 To determine whether desalination is economically feasible as a source oflarge-scale water supply.2 Arid regions of the world are under severe water stress, which is becomingworse because of increasing population. Existing groundwater reserves arebecoming depleted and contaminated through overuse.3 Yes. Shrinking desalination costs lead to the conclusion that it is likely to beeconomically feasible.4 Yes. As above.5 Desalination is suitable for Middle East / North Africa because of extremewater stress and proximity to the sea. Also, groundwater use is nonsustainable.6 Opinions on this may differ, but I would tentatively suggest that therecommendation addresses the problem.3e Students compare their answers.Unit Task: Water research projectAssignment 1aAnswersLarge-scale water infrastructure (dams; water transfers; reservoirs; pumpingdeep groundwater)Sustainable approaches to water supply (micro-dams; rainwater harvesting;non-conventional water sources; water management)bStudents read and take detailed notes relevant to the assignment title.Assignment 2abcStudents read through the complete set of lab instructions and make notes in theirlogbooks about the theoretical background and method.Student discussionStudents work together with their partner to think of solutions to the possiblesources of error.Note: This section focuses on researcher errors (blunders) rather than trueinstrumental sources of error.Unit 2 Part B ∙ Understanding written information 48