Use your text book and the following links:
Visual Dictionary Online to complete the questions related to timber.
Research information on the structure of a tree to find out information for the following questions.
What percentage of the tree is water?
How does water get from the ground to the top of the tree?
Draw a diagram showing the structure of a tree.
The structure of a tree and the water content can make a tree quite strong and very heavy, watch the following video comparing the strength of a car and a tree (watch from the 2 minute point, note: 55 mph is 90 kph).
What do you think gives the tree so much strength?
See if you can find other examples of where trees (mother nature) overcomes man made machine.