Explorit's Tree Quiz

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QUESTION 1:
Recycling one US ton of waste paper can save how many trees?

7 trees     17     71     107

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QUESTION 2:
When an average hardwood tree is harvested and used for its various purposes, what fraction of its original volume do you think is able to be sold as timber?

seven eighths     four eighths (half!)     one eighth.

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QUESTION 3:
What sort of tree is the oldest living tree in the U.S.?

Bristlecone Pine     Giant Sequoia     Douglas Fir.

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QUESTION 4:
The tallest tree ever measured was reported in 1872 as being 435 feet tall and was probably taller. This tree is no longer standing but do you know what sort of tree it was?

Coast Redwood     Sugar Pine     Australian Eucalyptus.

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QUESTION 5:
As a tree grows it adds a new layer each year to the cylinder of xylem and phloem that surrounds the core of its trunk. (Xylem cells transport water and dissolved minerals and phloem cells transport the food materials produced mainly in the leaves.) When a tree trunk is cut across the layers of xylem and phloem are seen as concentric layers known as annual rings. What can you learn from examining these rings?

The age of the tree     past climatic conditions

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QUESTION 6:
Many sorts of trees change color in the fall. The sugar maple turns red and orange, the ash tree turns a dark plum color, and the willow turns yellow. The reason for the color change is that something that has been present in the leaves is no longer produced in the fall and so the fall colors are revealed. What is the substance that obscures the red and yellow pigments during the spring and summer months?

Glucose     Chlorophyll     Tree sap

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