PRACTICAL: Investigate effect of light/gravity on the growth of newly germinated seedlings (7 Stages)

- Germination: beginning of plant growth, plant will continue to grow if correct conditions are available - Mustard or cress seeds are a good choice as they grow fast & their roots & stems are clearly visible METHOD: 1) Put cotton wool into three petri dishes, add same volume of water to each dish 2) Add ten seeds to each dish, place them in a warm place where they won’t be disturbed 3) Allow the seeds to germinate, and add more water if the cotton wool dries out 4) Once the seeds have germinated, ensure the petri dishes each contain the same number of seeds, remove any extra seeds if necessary 5) One petri dish will sit in full light on a windowsill, the second in a dark cupboard, the final dish in partial light 6) Every day for one week, measure the height of each individual seedling and record the results in a table 7) Calculate mean of the seedlings each day, and compare the mean heights in the three different locations