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In this demonstration activity, students make structural models of gas molecules using pipe cleaners and polystyrene balls and test their molecules for their resonant frequency. Students shake the models, count vibrations, and compare the resonance... (View More)

In this textbook chapter, students are introduced to Mendelian inheritance and the biological processes through which changes in DNA are created and propagated within a population. An activity teaches students about dominant and recessive alleles,... (View More)

Audience: High school
Materials Cost: Free

This model demonstrates convection currents and uses water, food coloring, a cup of very hot water and a votive candle as heat sources. Movie clips of demonstration setup and convection in action are provided. This activity is supported by a... (View More)

This introductory textbook chapter presents data demonstrating decreased global biodiversity and its link to human activity. The resource includes a field-based student investigation of local biodiversity, links to current news articles, and an... (View More)

In this lab activity, student teams hypothesize which source has a greater becomes CO² concentration: their breath, auto exhaust, or air in the classroom. They test gas samples from each of these sources, plot data, and hypothesize about the... (View More)

In this activity, learners select the scientific instruments for their satellite, calculate the power requirements for all the subsystems, and construct a scale model of their very own Earth observing satellite using building blocks and/or Legos.... (View More)

This textbook chapter outlines the historical development of the Theory of Natural Selection, presenting classic evidence including Darwin's study of finch beak variation in the Galapagos Islands and Kettlewell’s investigation of the pepper moth... (View More)

Keywords: Adaptation; Evolution
Audience: High school
Materials Cost: Free

This lesson provides an opportunity for students to express their ideas through literature. Teachers will read a story on clouds to students, then take students outside to observe actual clouds. Students will create drawings of what they see,... (View More)

Keywords: Clouds
Audience: Elementary school
Materials Cost: Free

Emphasis is placed on preparing for severe weather events such as thunderstorms, tornadoes and blizzards. Following classroom discussion and internet research, students prepare and present a product (brochure, poster, video, etc.) on the... (View More)

Audience: Elementary school
Materials Cost: Free

This activity is about groundwater and how an underground aquifer can be affected by actions on the surface that are miles away. Using an aquarium, leaners will construct an interactive groundwater model to demonstrate how water flows through the... (View More)