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Learning how to delineate a wetland using official criteria can be an enlightening experience for students and teachers. The objective of this investigation is for students to delineate the boundaries of an area in a…
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In this investigation, students will select, identify, and test a common plant for allelopathy by extracting the plant’s natural chemicals and measuring the effect on the germination of lettuce seeds. They will analyze…
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When humans change the natural topography, certain effects are likely to be seen in a watershed. The transportation of water and sediment increases when streams are straightened and, with the increased flow rate of…
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Streamflow, or discharge, is defined by the U.S. Geological Survey (USGS) as the volume of water flowing past a fixed point in a fixed unit of time. The discharge of a stream can be affected by many things, including…
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Flood Frequency Analysis for a River
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In many watersheds, the frequency of flooding has greatly increased in the past 20 years, mainly due to changes in the hydrology as a result of farming and urbanization. Human habitation of floodplains causes floods to…
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Comparison of Phosphate Levels in Stream Sediments
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Phosphorus is an important nutrient to all life. Unfortunately, when phosphate reaches the soil it is not all used up by the plants. If excess phosphate enters the waterways in the watershed, it can cause increased…
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This simple but engaging activity about texture is for students in grades K–4. Textures are all around us, and they are important to our everyday activities—consider a piece of sandpaper, a cheese grater, or the soles…
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Investigating the Properties of Magnets
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In this activity, younger students encounter, discuss, and apply the basic characteristics of magnets and magnetism as they explore and elaborate on their experiences. Student groups implement some of the terminology…
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Applying Simple Chromatography
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This activity involves chemistry, mystery, colors, and measurement. Students observe the composition of various inks by separating them via water-based chromatography. Students use what they learn about chromatography…
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Investigating Surface Tension and Soap
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You students encounter soap and water every day and the activity in this chapter helps them learn something new about both substances. Students find out why water can actually overfill a cup without spilling and why…
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Learning About Acids and Bases
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The chemistry of acids and bases is a fundamental area of study in the physical sciences. The following activity is really two exercises in one. First, students learn to distinguish between acids and bases using various…
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For this Earth science investigation, students examine the composition of soil samples taken from three different depths at the same location. Students answer questions such as “How do the three samples compare? How…
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In this activity, students examine garden variety rocks, classifying them based on observable properties. This lesson teaches students not only about rocks but also about how to take a closer look at objects and…
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Book Chapter |
Students learn what evaporation is and how various factors—time, heat, surface area, and wind—affect it. They also discover that water does not always evaporate at the same rate and saltwater leaves something behind…
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Examining Colors, Color Perception, and Sight
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Students of all ages are fascinated by color and how we perceive it. For the main activity in this chapter, your class explores colors and visual perception by mixing colors in several ways. Students learn more about…
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