Text 4. The following text is for questions no 13 – 16
In autumn, the colour of the leaves
changes into beautiful yellow, red, and brown. Do you know how this happens? To
answer that question, first we have to understand about leaves.
Leaves are the food factories
of plants. Plants take water from the ground through their roots and they take
carbon dioxide from the air. Plants need glucose for energy and for their
growth.
The plants use sunlight to
turn water and carbon dioxide into glucose. The process is called
photosynthesis and the substance that helps this photosynthesis process is
called chlorophyll. This chlorophyll makes plants look green.
As summer ends and autumn
comes, the days get shorter and shorter. The trees "know" that they
have to be ready for winter. During winter, there is not enough sunlight or
water for the photosynthesis process. The trees will rest, and use the food that
they have stored during summer. The trees begin to close their food factories.
The green chlorophyll substance disappears from the leaves. As the leaves begin
to lose their green colour, they change into beautiful yellow and orange.
In some trees, like maple
tree, glucose is trapped in the leaves after the photosynthesis process stops.
Sunlight and cool rights turn the green colour of the leaves into red. Oak
leaves become brown because of wastes that are left in the leaves. This
combination of red and brown makes the trees look very beautiful in autumn.
13. What is the best title for the text above?
A. Tree
B. Seasons
C. Photosynthesis
D. The changes
of leaves
E. Beautiful Autumn
14. A part of trees which is used to take water from the ground
is...
A. branch D.
fruit
B. root E.
stem
C. leave
15. When do the trees produce their food?
A. in winter D. in summer
B. in spring E.
in fall
C. in autumn
16. “The plants use sunlight to turn water and carbon dioxide
into glucose” (paragraph 3). The underlined word “turn” has the same meaning as
…
A. change B. absorb C. dry D. take E. preserve
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