Cockle Bay has a many trees, and it is interesting to consider how old they are. You can work out the age of tree by looking at their growth rings. Every Spring, trees need to transport huge amounts of water up to the new leaves, and this shows as a darker line on a cross section of the trunk. However, to do this you would have to cut down the tree!
Instead, we measured the circumference of different trees using wool. Back in the classroom, we straightened the wool out and measured it with metre rulers to find out the circumference, or girth of the tree. Next we calculated the approximate age of each tree using a mathematical formula. On average, every a tree's girth grows by 2.5cm a year, so we could estimate its age by dividing the girth by 2.5. This was a good time to practise our calculator skills!
Instead, we measured the circumference of different trees using wool. Back in the classroom, we straightened the wool out and measured it with metre rulers to find out the circumference, or girth of the tree. Next we calculated the approximate age of each tree using a mathematical formula. On average, every a tree's girth grows by 2.5cm a year, so we could estimate its age by dividing the girth by 2.5. This was a good time to practise our calculator skills!
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