5thCLASS_97_185_jg:Layout 1 5/3/12 17:44 Page 121


Treesandinsects Here is a list of trees found in Ireland and the number of insect species they support. Which trees would you plant to support the greatest number of insects?


Native trees Oak


Willow Birch


Hawthorn Scots pine Ash


Holly


Insects 284 266 229 147 91 41 7


Non-native trees Beech Spruce Lime Larch


Sycamore


Sweet chestnut Horse chestnut


Insects 64 37 31 17 15 5 4


Thefoodfactory The tree, just like all green plants, makes its own food. The tree’s food is made in its leaves. Because leaves contain a green substance called chlorophyll, they can trap energy from the sunlight. Leaves are carefully arranged on each tree to catch the maximum amount of sunlight possible. They use this energy, along with carbon dioxide from the air and water from the soil, to make food which is sent to other parts of the tree to help it grow. This process is called photosynthesis.


1. What are the differences between broad-leaved and coniferous trees? 2. What is photosynthesis? 3. What gas do trees a.) absorb and b.) give off? 4. Make a list of other a.) broad-leaved and b.) coniferous trees. 5. What new terms have you learned in this unit? Explain what each one means. 6. Research some other interesting facts about trees around the world. 7. Choose a tree and find out as much as you can about it. Bring a leaf, twig, flower or fruit into the class.


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