Why Do Plants Grow Under Sunlight

Plants grow when put under a sunlight. If a plants is placed under a red light, a blue light, a green light, and sunlight then which will grow the most? The hypothesis was if a plant is placed under a blue, red, green and sunlight, then the plant under the green light will grow the tallest of all plant. The experiment's independent variable was the type of light the plant is placed under. The dependent variable was the growth of plants (in cm). Some variables that were ceped the same was the amount of water (only at the beginning was the plants given ¼ cup water), the amount of sunlight (5:30 pm-6:30 am), and the amount of seeds (4). The experimental group was the plants placed under the red, blue, and green light. In the experiment the plants weren’t given enough water
Meanwhile, the sunlight-plant was placed in the same room with a window, so it could absorb the sunlight (it was placed inside so that the temperature was the same for all plants.) The average of growth for the sunlight-plant was 7.975 cm, the red light-plant was 6.6125 cm, the green light-plant was 6.3875 cm, and the blue light-plant was 6.5475 cm. In the experiment, the data collected rejected the hypothesis. At the very end of the experiment, all the plants only grew 1 cm. The sunlight-plant was the tallest, although at the beginning it showed that it was 2 cm taller than the others.

The dependent and independent have a relationship. The independent is what caused the dependent variable to occur. The type of light causes growth of plants. In the experiment, the way it turned out may be because the plants were not watered, or that the lights were left on too long. The lights, red and blue, make up sunlight, so that may be why they were not the