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Natural Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceNatural Resources3 Marks
Question
  1. Name a process by which oxygen is utilised from the atmosphere.
  2. Name the process by which oxygen is returned to the atmosphere.
✓

Answer

  1. Breathing in oranisims and photosynthesis.
  2. Photosynthesis is the process by which plants make their food using chlorophyll present within them which aids in the trapping of sunlight.
Once this process is over, as its chemical formula suggest, the plants are useful to us because pure oxygen is once again returned to the atmosphere.

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