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Abstract An experiment was designed to determine how the quality of light affects growth of bean plants Plants were germinated and planted in soil The plants were exposed to different light qualities 24 hours a day for 5 days The lights used were 60watt light bulbs one was left bare one was covered with a blue transparent cover and one was covered with a red transparent cover Every 3 days plants were watered the plants with 50mL of water and growth was measured daily The plant exposed to the white light grew the tallest followed by the plant exposed to the red light and the plant exposed to the blue light It was determined that there is a direct relationship between the quality of light and plant growth Purpose To determine how well plants grow in different kinds of light quantities colour Hypothesis The plant in white light will grow the best The plant with red light will be second best and the blue plant will grow the least We think the plants with blue and red light might die Materials 3 white light bulbs 3 lamps with 60watt bulbs 2 transparent colour sheets red blue 3 bean plants Ruler Tap water 50mL Procedure 1Put the 3 bean plants under 3 different light colours in a room where each plant will get the same amount of light exposure ex Room without windows for a week 24 hours a day 2 Place one plant under the white light one under the blue light and one under the red light using the 2 transparent colour sheets 3Once every 3 days water each plant with 50mL of water and measure each plant daily 4Do this for 1 week Observations Light QualityDayStem Length cmStem Width cmLeaf Length cmLeaf Width cm Blue Light11922555 22022555 3212355 42252355 5232355 Red Light116521512 216521515 3172218 4172218 51752252 White Light1224358 2224358 32343558 42354458 52454560 Analyse Our variable was to
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