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Product 14919

By: The Flinn Staff

With the Bioassay Experiment Kit for environmental science and biology, carry out a cooperative experiment to determine the effect of different concentrations of salt solutions on the growth and development of lettuce seeds.

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Running a bioassay and understanding the results are critical skills in environmental science. Environmental scientists use bioassays to study the effects of chemicals on biological organisms and to estimate their relative toxicity. In this kit, students carry out a cooperative class experiment to determine the effect of different concentrations of salt solutions on the growth and development of lettuce seeds. Interpreting the results allows students to predict the possible environmental effects of agricultural runoff, drilling and mining wastes and industrial discharge. Students may be surprised at the “toxicity” of ordinary table salt! Kit contains detailed procedures, Teacher Notes and reproducible student worksheets.

Complete for 30 students working in pairs.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

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

Disciplinary Core Ideas

MS-LS1.B: Growth and Development of Organisms
HS-LS1.B: Growth and Development of Organisms
HS-LS2.A: Interdependent Relationships in Ecosystems

Crosscutting Concepts

Cause and effect
Systems and system models
Scale, proportion, and quantity
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-LS2-2. Use mathematical representations to support and revise explanations based on evidence about factors affecting biodiversity and populations in ecosystems of different scales.