Introduction to Photosynthesis Photosynthesis the fundamental process by

Introduction to Photosynthesis

Photosynthesis: the fundamental process by which plants manufacture carbohydrates from raw materials using energy from light… ie plants can make their own food!

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Discuss and answer ? In pairs Raw Materials Equipment Products Water Sunlight Glucose (sugar) Where does it come from? Where does it need to go? Carbon dioxide Where does it come from? How does the plant take it up? Is sunlight a wave or particle of energy? Chloroplasts containing chlorophyll Where are these found? Where is this made? Does it stay there all the time? Oxygen How does this escape from the plant?

You need to know the balanced chemical equation for photosynthesis. Try and balance the equation above.

Plants’ uses of plant glucose Raw material for growth, repair and replacement of damaged parts Used immediately to provide energy source for respiration in cells (glucose + O 2= energy) To make fats & oils (energy stored in seeds) Glucose Energy stored as sucrose (in fruit) Energy stored as starch (in leaves, seeds, roots and tubers) Energy used to turn sugars, nitrates & other nutrients into amino acids which build up proteins To make cellulose, the main structural material in cell walls

Limiting Factors in Photosynthesis

Now have a look at the demonstration of Elodea (water weed) • Try and answer the following questions as you are given the demonstration • What are the effects of changing: 1) Carbon dioxide concentration 2) Temperature 3) Light intensity

What happens when we change these factors? Show App