why is the grass green and the sky blue?

Question: why is the grass green and the sky blue?
- Keywords:
  colour,
  grass,
  sky
Asked by azzle to Anna, Hayley, Iain, Rebecca on 23 Jun 2015.
- Rebecca Jones answered on 23 Jun 2015:
  
  The grass is green due to the cholorphyll in the cells which absorb the sun which are green in colour. This gives grass its green colour. The sky is blue because molecules in the air scatter more blue light than red light so the sky appears blue.

Question: why is the grass green and the sky blue?