GCSE chemistry topic 10 new spec worksheet using Earth's resources and sustainable development

based on the AQA spec (reference included) - the first part of topic 10. Exam style questions with approximate 3 - 9 grades. The worksheet comes in 2 levels of difficulty for differentiation (harder and easier/foundation). Takes about 30 - 40 minutes. Answers in a separate document
objectives: exam technique, maths, subject knowledge
good for: homework, part of a lesson, revision,cover, catch up sheet for absent students, part of an independent study if lesson time is short
differentiation: two levels of difficulty - easier/foundation and harder