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FlinnPREP™ Inquiry Labs for AP® Biology: Water Potential

By: The Flinn Staff

In the Water Potential Inquiry Lab Solution for AP® Biology, students study the effect of salt on plant cells in order to form and test a hypothesis in an experiment.

Includes access to exclusive FlinnPREP™ digital content to combine the benefits of classroom, laboratory and digital learning. Each blended learning lab solution includes prelab videos about concepts, techniques and procedures, summary videos that relate the experiment to the AP® exam, and standards-based, tested inquiry labs with real sample data. FlinnPREP™ Inquiry Lab Solutions are adaptable to you and how you teach with multiple ways to access and run your AP® labs.

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Big Idea 2, Investigation 4, Science Practices 2, 4, 5

Interactions between selectively permeable membranes, water and solutes are critical to all cellular and organism functions. Even ecosystems are affected by the flow of water into, through and out of plants and animals. Water and nutrients move through plant and animal cells due to differences in water potential.

In this Inquiry Lab Kit, students begin with a Baseline Activity that allows them to study the effect of salt on a typical plant cell using a compound microscope. Their observations provide the basis for the Opportunities for Inquiry section of the lab. Questions like, “How can water potential be determined for living plant tissues?” and “How would cooking affect water potential?” help guide and inspire students to develop a testable hypothesis and then design an experiment that they can plan, discuss, evaluate, execute and finally justify to their peers.

Includes detailed teacher notes, reproducible student handouts and enough materials for eight groups of students to complete the Baseline Activity and to prepare for the inquiry activity. Compound microscopes and 0.01-g precision balances are required and available separately. A purple onion and various tubers are also required.