Search Results

Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

This is an activity about dinosaurs, fossils, and the work of paleontologists. Learners use hand tools (paint brushes, scoops, and sifters) to unearth fossil specimens in tubs of birdseed.

In this chemistry demonstration, acid rain is simulated in a petri dish.

Learners make a refrigerator that works without electricity. The pot-in-pot refrigerator works by evaporation: a layer of sand is placed between two terra cotta pots and thoroughly soaked with water.

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

Learners work in pairs to design, construct, and test a device that exhibits positive, neutral, and negative buoyancy. They test a number of different objects in water to see if they sink or float.

Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.

Learners use a candle to investigate the products of combustion. When a glass rod is held over a lit candle, the candle flame deposits carbon on the rod.

This display shows slow chemical reactions in colorful crystal formations known as Liesegang Rings. These reactions are similar to those forming the rings in agates.

In this activity, early learners simulate fossil prints in play dough or clay.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

Learners will explore the scientific mystery behind a disappearing group of trees by examining data and attempting to explain the decline.