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Seven Wonders of The World

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Super Trees

Super trees?

These trees can grow to be the tallest trees on Earth. They can produce lumber, support jobs, safeguard clear waters and provide refuge for countless forest species. Aren't they super?

However, these trees can be damaged too. The two major sources of tree damage are biotic (from living sources) and abiotic (from non-living sources).

Biotic sources would include insects which might bore into the tree, deer which might rub bark off the trunk, or fungi, which might attach themselves to the tree.

Abiotic sources include lightning, vehicles impacts, and construction activities. Construction activities can involve a number of damage sources, including grade changes that prevent aeration to roots, spills involving toxic chemicals such as cement or petroleum products, or severing of branches or roots.

Test Your Science (1)

1 What is the name of the bony case that protects a mammal's brain?

2 What is first food of a baby mammal?

3 How many limbs does a mammal have?

4 What colour is a mammal's blood?



Do you know the answers to the questions given? Write them in the comment box.