Curated OER
Ice Floats
Young scholars explore the changing density of water. In this physics instructional activity, students investigate how an object's density determines whether it will float or sink in water. They explain why this unique property of is...
Curated OER
Building a Terrarium System
Students create their own terrariums. In this ecological model lesson, students create terrariums using soil, seeds, pebbles, and two liter bottles. Students compare the elements of a terrarium to a food web.
Pennsylvania Department of Education
Cycles, Systems, and Webs
Fourth graders review the parts of the plant and their functions. In this plant lesson plan, 4th graders recognize that plants must transfer energy to make food. Students understand the interdependence of organisms in an ecosystem.