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Word Count: 398
Aim To investigate the effect of one environmental factor on the phenotype of pea plants Background Information Pea seeds are available with identical genetic information for height - tall or dwarf peas These seeds can be used to demonstrate the effect of the environment on the final height of the pea plants Tall or dwarf peas can be grown in identical conditions where all variables are kept constant apart from one environmental factor Any differences in the height of the pea plants will be due to the environmental factor and not the genes Risks Assessment Potting mixes contain microbes including bacteriafungi Inhalation of dust may irritate the nosethroatlungs Direct contact may cause skineye irritation Safety Procedures Avoid contact with eyes or skin Avoid breathing in dust Wear protective lab coatsgloves Apparatus 2 pot plants 2 labels 1 texta watering can 2 heaps of soil 6 pea plant seeds 10 mls of water 2 trays VARIABLES Independent Variable Amount of light given to the pea plant Dependent Variable growth and height of the pea plant Controlled Variable water soil pot size Method 1 First grab a pair of gloves and put them on 2 Choose any two same size pot plants and place them under the tap 3 Turn on the water so that it is softly flowing begin to mix the compost with the water and make it into a wet soil 4 Grab six seeds off of the teacher to be planted 5 Once done poke your finger into three central positions of the mix and plant the seeds in there this should be about 2cm deep 6 Cover the seeds and label the pot with your name and whether it is the one that goes into the light or the one that goes in the dark 7 Go and
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