erosion by water [matching pictures to labels]

Pictures to move

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This is the landscape before any water erosion took place.

This is the same landscape after 1000 years of water erosion.

This is the same landscape after 10,000 years of water erosion.

This is the same landscape after 2 million years of water erosion.

Look at each of the labels. Look at the top picture. Can you decide under which label the picture should go? Drag each of the pictures and drop them below the label to which you think they belong.