Lesson 01: The concept photosynthesis and its process

LESSON 1
PHOTOSYNTHESIS AND ITS PROCESS
Ø  What is photosynthesis?
v  IS A CHEMICAL PROCESS DURING WHICH GREEN PLANTS USE THE ENERGY IN SUNLIGHT TO CONVERT CARBON DIOXIDE GAS AND WATER INTO GLUCOSE?
Ø  REQUIREMENTS FOR PHOTOSYNTHESIS: FOR PHOTOSYNTHESIS PLANTS NEEDS
v  Sunlight, which provides the energy for the process
v  Chlorophyll, which absorbs sunlight energy
v  carbon dioxide gas, which is absorbed from the air through small openings on the surface of the leaves, and
v  Water, which is absorbed from the soil and moves from the roots to the leaves.
Ø  PHOTOSYNTHESIS PRODUCES
v  GLUCOSE, WHICH IS A TYPE OF SUGAR MOLECULE, AS ITS MAIN PRODUCT.AND
v  OXYGEN AS A BY-PRODUCT THAT IS RELEASED INTO THE AIR.

PROCESS OF PHOTOSYNTHESIS 


Ø  PLANTS CHANGE GLUCOSE INTO OTHER COMPOUNDS
v  PLANTS USE THE GLUCOSE THEY PRODUCED DURING PHOTOSYNTHESIS TO HELP WITH THEIR LIFE PROCESSES.
v  SOME OF THE GLUCOSE IS BROKEN DOWN TO RELEASE ENERGY, WHILE THE REST IS CHANGED INTO OTHER COMPOUNDS. THESE COMPOUNDS INCLUDE:
·         SUCROSE: SUCROSE CONSISTS OF TWO SUGAR MOLECULES JOINED TOGETHER. IT IS THE FORM IN WHICH SUGAR IS TRANSPORTED FROM ONE PART OF THE PLANT TO ANOTHER
·         STARCH: STARCH IS MADE UP OF SPIRALS OF LONG MOLECULES BRANCHING CHAINS OF SUGAR MOLECULES JOINED TOGETHER. IT IS THE MAIN FORM IN WHICH PLANTS STORE ENERGY,AND

·         CELLULOSE: CELLULOSE IS MADE UP OF LONG LINEAR CHAINS OF SUGARS. IT IS VERY STRONG AND IS USED TO PROVIDE STRUCTURE AND SUPPORT IN PLANTS.




 DATE: 18 JANUARY 2016
Photosynthesis
Home work

  1.  Describe the process of photosynthesis
  2. 1.    Copy and complete the table to summarize the requirements for photosynthesis


    Requirement
    Source
    Role in
    photosynthesis
    1.    Carbon dioxide


    2.    water


    3.    Chlorophyll


    4.    Sunlight

     


3. Name the main product of photosynthesis.

4. Plants can convert the main product of photosynthesis into other substances. Name two

   of these substances and describe the function of each.

5. Name a by-product of photosynthesis

6. Describe what happens to the by-product of photosynthesis.

7. Write a paragraph to describe how you would test for starch in a plant leaf.

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