Trees changing

In these pictures of the same view taken 11th Sept and 29th Oct we can see how much the trees have changed. Willow age 5 wanted to say what she had learnt about why the leaves change colour in Autumn. She remembered that all the red, orange, yellow and sometimes even purple colours had been there all along. But during the spring and summer when there was more sun the green chlorophyll that the leaves use to make food for the tree (photosynthesis) makes the leaves look green and we can't see the other colours. As the days get shorter and there is less sunshine there is less chlorophyll and we can see the other colours. Then eventually the leaves fall off. Unless the trees are evergreen of course!