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Water Potential—Blended Inquiry Lab Solution for AP® Biology, 1-Year Access

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.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Planning and carrying out investigations
Developing and using models
Analyzing and interpreting data
Using mathematics and computational thinking
Constructing explanations and designing solutions

Disciplinary Core Ideas

HS-PS2.A: Forces and Motion
HS-PS3.B: Conservation of Energy and Energy Transfer
HS-LS1.A: Structure and Function
HS-LS1.B: Growth and Development of Organisms

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity
Systems and system models
Energy and matter
Structure and function
Stability and change

Performance Expectations

HS-LS1-2. Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
HS-LS1-3. Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis.