activities for teaching biology

Introduction to Osmosis

This activity begins with a student investigation of the phenomenon of osmosis and then moves to analysis of the mechanism and implications of osmosis. In Part I, "What is happening to these eggs?" students observe and analyze the effects of osmosis on eggs. In Part II, "Understanding Osmosis", analysis and discussion questions introduce students to the molecular basis for osmosis and challenge students to apply their understanding of osmosis to several real-world phenomena.

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Who Took Jerell’s iPod? -- An Organic Compound Mystery

In the lab, Who Took Jerell’s iPod? -- An Organic Compound Mystery, students learn how to test for triglycerides, glucose, starch, and protein and then use these tests to solve a mystery. The activity reinforces students understanding of the biological functions and food sources of these different types of organic compounds.

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What Parts of a Plant Do We Eat?

In the lab, What Parts of a Plant Do We Eat?, Students review the structure of angiosperm plants and learn about the diversity of plant form by using evidence from examination of fruits and vegetables to identify which part of the plant each fruit or vegetable is.

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Alcoholic Fermentation in Yeast

In the lab, Alcoholic Fermentation in Yeast, students learn about the basics of aerobic cellular respiration and alcoholic fermentation and design and carry out experiments to test how variables such as sugar concentration influence the rate of alcoholic fermentation in yeast. In an optional extension activity students can use their yeast mixture to make a small roll of bread.

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Studying Our Senses

In the lab, Studying Our Senses, students investigate how a person identifies different flavors of jellybeans, including the contribution of smell to taste sensations. Students also explore the surprising ways the brain interprets the patterns of light and dark that reach our eyes; visual illusions illustrate general principles of sensory processing. 

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Breathing and Holding Your Breath

In the lab, Breathing and Holding Your Breath, students begin with interactive activities to develop a basic understanding of why cells need oxygen and need to get rid of carbon dioxide, how the circulatory and respiratory systems cooperate to bring oxygen and remove carbon dioxide from cells all over the body, and how the nervous system regulates breathing. Then, students carry out an experiment to test whether changing levels of oxygen and carbon dioxide influence how long they can hold their breath. 

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Regulation of Human Heart Rate

In the lab, Regulation of Human Heart Rate, students learn how to measure heart rate accurately. Then students design and carry out an experiment to test the effects of an activity or stimulus on heart rate, analyze and interpret the data, and present their experiments in a poster session. In this activity students learn about both cardiac physiology and scientific method.

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Invertebrate Diversity

In the lab, Invertebrate Diversity, students compare the external anatomy and locomotion of earthworms, mealworms, crickets and crayfish, all of which can be purchased at low cost from local pet stores.  Discussion questions help students understand the evolutionary basis of observed similarities and differences. This activity can be used as an introduction to the Annelid and Arthropod phyla and the principle that form matches function.

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Some Similarities between the Spread of an Infectious Disease and Population Growth

In the lab, Some Similarities between the Spread of an Infectious Disease and Population Growth, a simple simulation demonstrates exponential spread of infectious disease in a population, and discussion questions develop student understanding of how human diseases spread. Additional discussion questions and a graphing activity develop an understanding of exponential and logistic population growth.

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Evolution by Natural Selection

In this simulation activity, Evolution by Natural Selection, principles of natural selection are demonstrated by a simulation involving different color pompoms and student feeders equipped with different types of feeding implement. Students analyze results to see how different traits contribute to fitness in different habitats. Additional examples and questions help students to understand the process of natural selection, including three necessary conditions for natural selection to take place.

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