Simply put photosynthesis is the method which plants use to create their own food. Plants need their own food to create energy to grow and repair cells the same as humans.
They have to input several ingredients to make this food, these are carbon dioxide(CO2), water and sunlight.
the food which is made is actually in the form of glucose, which is a pentose sugar. This is a small molecule an is water soluble, so to store the molecules are turned into starch which is a longer chain molecule and is insoluble.
There is also a by product of oxygen during this process of photosynthesis which is important to remember.
To make the change from the ingredients to the glucose, the energy of the sun is harnessed by the green pigment chlorophyl, which is contained in the chloroplasts in the leaf cells. the complex process then occurs combining the ingredients.
You may need to know both the word equation and the symbol equation for your syllabus, which are:
Carbon dioxide + water + sunlight —————–> glucose + oxygen
6CO2 + 6H2O + sunlight ————-> C6H12O6 +6O2
Remember to write the clorophyll over the arrow during this equation
This process is very important environmentally because it leads to the plants being able to start the food chain and creates oxygen from carbon dioxide. In todays world worries about global warming are at an all time high therefore the removal of carbon dioxide from the atmosphere is seen as very important.
thank you for reading this article and i hope it has helped in your revision, remember to check your syllabus to make sure this is all you need to know. If you found this helpful please give my article a good rating and good luck in the exam