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Great science experiments for kids 4-5 years old

Our latest science experiments for kids is all about leaves

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computerized experiments on photosynthesis in plants …

However, the mechanisms of how plants control chloroplast development to accommodate the functions of different tissues and cells had eluded scientists.

In the current study, the research group led by Assistant Professor Koichi Kobayashi, Professor Tatsuru Masuda, and Professor Hajime Wada at the Graduate School of Arts and Sciences, the University of Tokyo, demonstrated using Arabidopsis thaliana—a small flowering plant commonly used in plant experiments—that when plants lose their shoots (leaves and stems), they increase the photosynthetic capacity of their roots through enhanced sensitivity to cytokinin via a protein that reacts to wounding in plants.

Photosynthesis Experiment Elodea Plant - Bing images

N2 - Using field experiments and mathematical models, we tested whether internal waves enhance photosynthesis as they move phytoplankton through a nonlinear light field in situations where photosynthesis is light limited. Phytoplankton circulated at depths mimicking isotherm displacement for moderate wind speeds had elevated photosynthetic rates compared to static incubations. Experiments and modeling revealed that surface light variation due to cloud cover interacts strongly with the effects of internal waves and may have positive or negative effects on photosynthesis depending on the relative phase of internal wave displacement and light variation. The combined effects of internal waves and fluctuations in surface irradiance ranged from a 15% reduction up to a 200% enhancement. The distribution (sine wave vs. Gaussian) of the vertical displacement of internal waves is also important in determining the internal wave effect on photosynthesis. Internal waves in a wide variety of aquatic systems and with hourly to weekly periods show a strong potential for internal wave-induced enhancement of photosynthesis. The realization of this enhancement is dependent on characteristics of the internal waves, of algal photosynthetic response, and of variable surface light.

Elodea Plant Photosynthesis Experiment

The making of a photosynthetic animal Journal of Experimental Biology

AB - Using field experiments and mathematical models, we tested whether internal waves enhance photosynthesis as they move phytoplankton through a nonlinear light field in situations where photosynthesis is light limited. Phytoplankton circulated at depths mimicking isotherm displacement for moderate wind speeds had elevated photosynthetic rates compared to static incubations. Experiments and modeling revealed that surface light variation due to cloud cover interacts strongly with the effects of internal waves and may have positive or negative effects on photosynthesis depending on the relative phase of internal wave displacement and light variation. The combined effects of internal waves and fluctuations in surface irradiance ranged from a 15% reduction up to a 200% enhancement. The distribution (sine wave vs. Gaussian) of the vertical displacement of internal waves is also important in determining the internal wave effect on photosynthesis. Internal waves in a wide variety of aquatic systems and with hourly to weekly periods show a strong potential for internal wave-induced enhancement of photosynthesis. The realization of this enhancement is dependent on characteristics of the internal waves, of algal photosynthetic response, and of variable surface light.

Other possible factors to test or experiments to preform to improve this lab is more trials to be conducted of these labs for more accurate data, temperature, pH and more variety of different plants to test rate of photosynthesis.
1.) Prepare 300 mL of .2% bicarbonate solution.
2.) Pour the bicarbonate solution into one of the clear plastic cups, then label.

Independent Research Leaf Disc Photosynthesis Lab

The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from

Using field experiments and mathematical models, we tested whether internal waves enhance photosynthesis as they move phytoplankton through a nonlinear light field in situations where photosynthesis is light limited. Phytoplankton circulated at depths mimicking isotherm displacement for moderate wind speeds had elevated photosynthetic rates compared to static incubations. Experiments and modeling revealed that surface light variation due to cloud cover interacts strongly with the effects of internal waves and may have positive or negative effects on photosynthesis depending on the relative phase of internal wave displacement and light variation. The combined effects of internal waves and fluctuations in surface irradiance ranged from a 15% reduction up to a 200% enhancement. The distribution (sine wave vs. Gaussian) of the vertical displacement of internal waves is also important in determining the internal wave effect on photosynthesis. Internal waves in a wide variety of aquatic systems and with hourly to weekly periods show a strong potential for internal wave-induced enhancement of photosynthesis. The realization of this enhancement is dependent on characteristics of the internal waves, of algal photosynthetic response, and of variable surface light.

Little ones looking to get their hands dirty will love these plant experiments for kids that teach basic plant biology concepts in a fun and hands-on way.
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