Impacts of Ocean Acidification and Elevated Temperatures on Acusta Assimilis

Overview

Ocean acidification and elevated temperatures are rising issues as they lead to substantial changes in the ocean’s chemistry and have adverse effects on the ecosystem of oceanic organisms. This investigation studied the impacts of increased ocean acidification and elevated temperatures on Acusta Assimilis: shell mass, shell transparency, shell darkness, scarred structures, corrosion, and perforation. The hypothesis was that the most significant signs of degradation and decrease in mass of the Acusta Assimilis shells would occur at the lowest pH and the highest temperature. Conversely, the least significant signs of degradation and decrease in mass of the Acusta Assimilis shells would occur at the highest pH and the median temperature. The independent variables were the buffered solutions (pH 4,6,8) and the temperature environments (5.56°C, 22.22°C, 40.0°C). The dependent variables were the change in mass of the Acusta Assimilis shells, shell transparency, shell darkness, scarred structures, corrosion, and perforations. The major findings of this experiment were that the more acidic the buffered solutions, the greater the significance of shell degradation and change in shell mass. The greatest significance of shell degradation and difference in mass occurred at the highest temperature (40.0°C), and the least significance of shell degradation and difference in mass occurred at the median temperature (22.2°C). The Two-Way ANOVA test displayed a higher F-Ratio for each factor than the critical value. The three nulls tested by the Two-Way ANOVA were rejected, and the hypothesis for each was supported. Does the Color of an Astronomical Body Affect the Observation of Decreasing Intensity with the Transit Photometry Method Makaila Jennings Key Destiny Homeschool, Huntsville, AL In our quest of whether there is life outside of our solar system, the focus has been on finding planets known as Super-Earths with Earth-like qualities suitable for life, but large enough for us to see. The purpose of this study is to see how the color of a Super-Earth affects the double-dip transit photometry method of detecting exoplanets. The procedure is to set up a star-planet system in a large four-foot black box with a color-changing and intensity- changing LED bulb to simulate the star. A Hot Jupiter (foam ball) is suspended from a rotating motor, orbiting close to the star, and a suspended Super-Earth (a bead) orbiting further from the star with three different colors (blue/green, red and yellow). Data was captured with a BH1750 light meter sensor connected to an Arduino Uno. Luminosity data was measured for each light color (red, yellow, orange, blue, and white) at high intensity with the motor running for the orbiting Hot Jupiter and pulley system for each color Super-Earth. The results of my experiment support my hypothesis that the color of the Super-Earth does affect the ability to detect it with the double-dip transit photometry method. The yellow Super-Earth was the easiest to detect and it was detected the most with the red star.

Competition history

• JSHS 2023 Category not listed

Resources

• National JSHS abstract book ↗

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