Download The Steps of Photosynthesis Questions

The Steps of Photosynthesis
Name
The Steps of Photosynthesis
Questions
1. How does a plant receive the carbon dioxide it needs for
photosynthesis?
By Erin Horner
It's a beautiful day. The sun
is shining. The wind is
blowing. The branches on
the tree sway from side to
side as if they were rocking
their leaves to sleep. But
those leaves are not
sleeping! They are actually
hard at work making food
for themselves and oxygen
for you. They are
photosynthesizing.
Green plants are autotrophs, or producers. They use light energy from
the sun to make food. This chemical process is called photosynthesis.
Plants need three things for photosynthesis to occur: sunlight, water,
and carbon dioxide. The sun's light, or energy, is absorbed by the
chlorophyll in the cells of the plant. Water is taken from the soil and
travels through the plant's root system. Carbon dioxide enters the
plant's leaves through tiny openings called stomata.
Once the plant has all of its ingredients, the process can begin. First,
energy that the plant has collected from the sun splits the water
molecules. It separates them into hydrogen and oxygen atoms. Next,
the hydrogen atoms merge with the carbon dioxide. This is where the
change takes place. This merge produces a new molecule: glucose.
That sugar is carried to all parts of the plant and used for fuel. Finally,
the waste product, oxygen, is released into the air. This process
repeats over and over again. Remember, a sunbathing plant is not a
lazy plant! It's actually a hardworking one. It's working for itself and
for you too!
2. Which of the following is a synonym for autotroph?
A. maker
B. consumer
C. buyer
D. autograph
3. The author probably wrote this article to ______.
A. persuade you to eat more green, leafy vegetables.
B. describe the process of photosynthesis.
C. demonstrate how to make your own sugar.
D. inform you about the dangers of hot and windy days.
4. Choose the best title:
A. Leaves Are Not Lazy
B. Sunshine Makes Me Sleepy
C. Summer Fun on a Sunny Day
D. Make Me Some Sugar!
Now that you know that trees and plants produce oxygen, you would
like to see more planted around your school's campus. Write a letter
to your principal. Try to persuade him or her to allow you and your
friends to plant more trees. Give specific reasons as to why he or she
should let you do this.
Name
Many people are worried about the growing rate at which forests are
being cut down and cleared. In light of what you now know about
photosynthesis, why do you think they might be so concerned?
Explain your answer.