Lifelong Learning Programme

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Chemistry is all around us
Copyright 2015
This project has been funded with
support from the European Commission

Educational Packages

Chemistry in Everyday life

Water cycle

Step 2 - Exercises

Which of the below cycles, if they are not complete, may cause vital activity to cease?

1- oxygen cycle
2- water cycle
3- nitrogen cycle

  • 1 and 2
  • 1 and 3
  • 2 and 3
  • 1,2 and 3