week 20 3

1 How long is the Great Barrier Reef?
2 How many sharks can be seen?
3 What three things is the Great Barrier Reef compared to?
4 Why are corals important for other forms of life?
5 How many kinds of mollusks live in the reef?
6 Which animals travel thousands of miles to lay their egs there?
7 When was the Great Barrief Reef appointed as a world heritage sight?
8 How old is the Great Barrier Reef?

You can read the transcript here.

Key:
1 2,000 kms 2 Very few, only occasionally 3 An underwater city , a rainforest and a mosaic 4 They provide shelter and food 5 4,000 6 Green sea turtles 7 In 1981 8 From 20,000 years to half a million years old