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Science

over 2 years ago

Microworlds

In Microworlds, students examine everyday objects as well as microorganisms with a variety of magnifying devices. They begin by investigating several common objects with the unaided eye. Using a variety of lenses, including hand lenses, acrylic spheres, and water drops, they learn that a magnifying lens must be transparent and curved. Next, students use a microscope to view inanimate objects. They learn proper focusing and lighting techniques as well as how to prepare slides. Students prepare a section of onion skin and observe its cells. 

Electric Circuits

In Electric Circuits, students are first introduced to the basic properties of electricity as they learn about electric circuits and the parts of a light bulb. Next, students learn about conductors and insulators and about the symbols used to represent the parts of a circuit in circuit diagrams.

Students also explore different kinds of circuits, learn about switches, construct a flashlight, and investigate the properties of diodes. Finally, students apply their knowledge and skills to wire a cardboard house.

Land and Water

In Land and Water, students investigate the interactions between land and water. Using a stream table as their model, students observe how runoff causes stream formation; how ground water forms; how soil is eroded, transported, and deposited; and how water shapes land. 

Students create hills, build dams, and grow vegetation. Miniature valleys, waterfalls, and canyons form in the stream tables as water flows over the soil. Students begin to appreciate the vastness of stream systems by creating aerial diagrams of their stream table results. The stream table also serves as a basis for investigations of the water cycle.