User:MarwanShoman

Have you ever wondered how and from where humans get food? Of course you will say: plants. But do you know what plants do to give us food? Plants make food by themselves not like us we get the ingredients and make food. This process by which plants make their own food by combining other materials with each other is called: photosynthesis. Materials such as: sunlight, water, carbon dioxide gas and chlorophyll: it’s a organell found in plants to convert light energy(sunlight) into chemical energy (glucose) or in simple words food. Plants get sunlight from the sun and carbon dioxide gas from the air supply and last but not least water from soil. photosynthesis process can occur in the absence of each of the four materials they are very necessary for this process. Chlorophyll stores   sunlight and carbon dioxide gas and water to make glucose (food) or starch: the main word equation for photosynthesis process is : Carbon dioxide gas + water chorophyll	glucose + oxygen gas. sunlight

this means that in photosynthesis process carbon dioxide gas is absorbed and oxygen gas is produced.

1)	It’s the main source of oxygen for all living organisms. 2)	It affects the percentage of oxygen and carbon dioxide gases. 3)	It’s the main source of food for many living organisms. 4)	When plants absorb sunlight it’s then as fossil fuel ( petrol,coal).

Sunlight is passed from the sun to the upper epidermis cell because it’s a permeable cell and then passed to the palisade cell the site of photosynthesis and then carbon dioxide gas diffuses from the air and into the stomata: an organ surrounded by two guard cells which is used to pass carbon dioxide gas. then it diffuses in the leaf till the mesophyll cell (palaside and spongy cell). Then water is passed by osmosis process it’s taken to the mesophyll cell by the vein (phloem and xylem vessel.