Tag: rate
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Enzyme and Substrate Concentrations
Students examine graphical models of enzyme and substrate interactions showing how the speed of reactions changes with concentration.
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Photosynthesis Virtual Lab
This lab was created to replace the popular waterweed simulator which no longer functions because it is flash-based. In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. A plant is shown in a beaker and test tube which bubbles to indicate the rate of photosynthesis.…
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Human Population Growth
Students graph population estimates for years ranging from 1650 to 2012. The graph will show an exponential growth curve which students analyze to determine how frequently the population doubles. Students also explore the concepts of carrying capacity and growth rates. Questions ask students to discuss what happens when the earth exceeds its carrying capacity and…
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Investigation: How Does Exercise Affect Heart Rate
Design and conduct an experiment to measure the effect of exercise on heart rate. Aligned to NGSS standard on feedback mechanisms.
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Investigation: What Factors Affect the Heart Rate of Daphnia
This investigation starts with a guided procedure where students gather data on the heart rate of daphnia when the organism is exposed to 1% ethanol. Daphnia are tiny crustaceans that are visible with the naked eye, though a microscope or stereoscope will be needed to see their heart rate.
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Investigation: Temperature and Fish Respiration Rate
Students investigate what happens to the respiration rate of a fish as the temperature is decreased. Analyze data and create a graph.