Read the following passage and answer the following questions:
The oxygen in the air is constantly being used up and turned into carbon dioxide. The green leaves of
trees, in fact, of all plants absorb the carbon dioxide from the air with the help of sunlight, break up
into carbon and oxygen; the carbon is used to make stars and oxygen is released into the atmosphere
That is how trees help to replace carbon dioxide with oxygen used up by animal. The grem cells of
leaves are wonderful little laboratories, where all the starch is produced. Since starch forms an important
part of the food of man and animals, their life depends on the work done by the green cells of plants
(a) How do trees help to replace carbon dioxide with oxygen?
Where is starch produced?
(c) What is the work of starch?
(0) Give the antonyms of break and little
Give the synonym of man and air
Section BWriting and Grammar)
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Answers
Answer:
Just as we humans are comprised of many parts functioning together allowing us to do wondrous things, the anatomy of a tree is just as wondrous, empowering them with super hero qualities.
What am I talking about? A tree has the ability to provide an essential of life for all living things on our planet – oxygen, and the power to remove harmful gases like carbon dioxide making the air we breathe healthier.
Here is how it works:
To keep it simple a tree is comprised of its leaves, stems, trunk and its roots. When you look at a tree, note that about five percent of the tree is comprised of its leaves, 15 percent its stems, 60 percent goes into its trunk and 20 percent is devoted to its roots.
Here is the super hero part. Through a process called photosynthesis, leaves pull in carbon dioxide and water and use the energy of the sun to convert this into chemical compounds such as sugars that feed the tree. But as a by-product of that chemical reaction oxygen is produced and released by the tree. It is proposed that one large tree can provide a day’s supply of oxygen for up to four people.
Trees also store carbon dioxide in their fibers helping to clean the air and reduce the negative effects that this CO2 could have had on our environment. According to the Arbor Day Foundation, in one year a mature tree will absorb more than 48 pounds of carbon dioxide from the atmosphere and release oxygen in exchange.