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In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

In this activity about human anatomy (page 20 of PDF), learners investigate the structure of muscles by comparing yarn and cooked meat.

In this activity (on pages 23-29), partners use the Plant Traveler Cards, along with a world map and map worksheets, to follow plants such as cassava, chocolate and coffee that grew first in one part

This is a classic exercise for visualizing the scale of the Solar System.

In this activity, learners use sets of cards to assign microorganisms to different groups.

In this tasty activity, learners make their own ice cream any day of the year in an exploration of heat and cold. Highlights include freezing and melting and the transition from liquid to solid.

In this activity, learners will develop a method to test five similar-looking powders (baking soda, baking powder, cream of tartar, detergent, and cornstarch) with four test liquids (water, vinegar, i

In this activity about combustion and energy, learners observe a burning candle in a sealed jar and the burning of white sugar.

In this activity, learners use a microscope to examine three different microbes: bacteria, yeast and paramecia. Educator will need to prepare the yeast solution one day before the activity.

In this activity, learners create an electrical circuit and investigate how some dissolved substances conduct electricity.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

Learners explore capillary action in plants (such as plants ability to move water from roots to leaves) in an investigation called Paper Blooms.