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Technology and society  
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High school  
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In this lesson, learners will discover how certain snakes (pit-vipers) can find prey using a natural infrared sensor and will extend their understandings by exploring infrared technology applications. The lesson features background information for... (View More)

This is a lesson about the science supporting the design and operation of an ion propulsion engine. Learners will study the concepts of formation and discharge of charged particles, attractive and repulsive forces between charged particles, and the... (View More)

Audience: High school
Materials Cost: Free

This is a lesson about the path of one xenon ion through an ion propulsion engine. Learners will focus on what a single xenon ion sees and does as it goes through the reactions and processes that provide the ion jet propulsion engine's thrust. They... (View More)

Audience: High school
Materials Cost: Free

Highly productive commercial agriculture, known as industrial agriculture, is the focus of this investigation. Students will analyze and compare the inputs and outputs of industrial agriculture after reading background information, examining photos... (View More)

Keywords: Farming

Students confront the challenge of improving global agricultural production in order to feed increasingly larger populations. Students evaluate tables, maps, graphs, photos and satellite images detailing global population growth patterns and... (View More)

Subsistence agriculture is introduced and described through text, satellite images, space shuttle photos, ground photos and maps. After reviewing all resources, student teams debate whether intensive subsistence agriculture (e.g., rice production)... (View More)

The Aral Sea, located between Kazakhstan and Uzbekistan, is diminishing in size. Students must analyze and interpret the background information, photos, images and data provided in order to determine the causes of the size change as well as the... (View More)

Keywords: GIS

The sustainability of the Nile as a water resource is investigated using maps, photos, data, graphs and a role-playing activity. Student groups will represent each of the 10 countries in the Nile River Basin. Data cards are provided for students to... (View More)

Keywords: Watershed

The use or abuse of the Chesapeake Bay is examined and discussed in the form of a student role-playing activity. Each student gathers relevant background information and formulates questions from briefing cards included in the investigation. Ten... (View More)

Learners will design and build models of life support systems for a settlement on the Moon. This activity is in Unit 3 of the Exploring the Moon teachers guide, which is designed for use especially, but not exclusively, with the Lunar Sample Disk... (View More)

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