The Open Door Web Site
LIVING AND NON-LIVING THINGS QUIZ
You think that chalk is non-living but was once part of a living thing.
Well done, you are correct!
Chalk finds its origins in invertebrate animals which lived in the seas many millions of years ago. These invertebrates had protective coverings made of calcium carbonate or chalk. When they died their remains fell to the sea beds. The organic parts of their bodies decomposed but the chalk remained. Earth movement in some parts of the world caused the chalk deposits to rise above sea level. The White Cliffs of Dover in southern England were produced in this way.
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