We kept one bean in the dark and one in the light, both germinated and grew into small bean plants. Students plant sunflower seeds in plastic cups, and once germinated, expose them to varying light or soil moisture conditions. In this post I’m sharing some of my favorites from over the years. A wide range of signals and information for morphogenesis and many other physiological processes is triggered by light (Chen et al. Check them daily. After a few weeks, they compare the growth of plants exposed to the different conditions and make comparative bar graphs that they analyze to draw conclusions about plant … Figure 02: Plants Grown in Dark Plants grow under dark conditions possess a thinner cuticle. Investigate the effects of light or gravity on the growth of newly germinated seedlings. Then have them sprinkle grass seed on top of the dirt. What are the effects of acid rain on plant growth? All things need energy to grow. What do you think will happen to the plant in the cupboard? Plant A is placed in a sunny area, Plant B is placed in a shaded location, and Plant C is placed in the dark room. We started with two plastic cups. Place the jar near a sunny window. 4. Blue light, for example, helps encourage vegetative leaf growth. between plants grown in the dark continuously and those under temporary light exposures, by placing the dark chamber just above the lamps, but the temperature of the plants in the light certainly rose a degree or two above that of the control. Investigate the effects of light or gravity on the growth of newly germinated seedlings. Plant A is placed in a sunny area, Plant B is placed in a shaded location, and Plant C is placed in the dark room. We had one 'Control' plant that only received light from above, and one 'Test' plant that only received light from beneath it. Three to seven days later, students compare the seedlings and then watch what happens when all are placed in the sun. Plants need light to grow because it is an important part of photosynthesis, the process plants use to convert carbon dioxide and water into food. Plants use light to convert it into energy in a process called ‘photosynthesis’. Growth Parameter Measurements . After conducting the experiment we found out that the plant grew better under flourescent light. We added the same amount of soil and seed to each cup and labeled them. Built for science students by science teachers. I introduce some bigger vocabulary to them when we talk about the science behind the experiment, but I basically just want them to understand that the water travels up the stem through tiny tubes to the leaves. Prof Gert Venter explains how this is done. A phototropic response involves the detection of a light wavelength by receptor molecules in plant cells, and transduction (i.e., conversion) of that signal into biochemical responses that lead to altered growth patterns. You can also do this activity around St. Patrick’s Day and put leprechaun faces on the containers and grow green leprechaun “hair”. Celery stalks that have leaves at the top work best. Plant material and growth conditions. The resources are all readily available and either cheap or free ... bean corn 0 20 40 60 80 100 120 140 160 180 light dark Seedlings Total Number of plant Hgt. Thanks for sharing these! 1. Can plants conduct electricity? Love them. This movement in response to light is called phototropism. This experiment has been around for years and is a great way to  demonstrate to students how plants get water from their roots all the way up to their leaves. Stuff a large jar with paper towels. Last year students had the idea to test liquids that we drink to see if plants would drink them too.
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