Predict This!

predict this!

Using Models to Observe Correlation and Improve Predictions

by Caleb Bryce, Kim Goetz and Pablo Barrick

In this mini-activity, students measure the masses of specific numbers of beans and graph their data. From their graph they determine a linear model equation. Using their model, they predict the number of beans based on a given mass. The students are asked to create their own model for estimating the number of marbles in a large jar.

Students learn: 1) How to make graphs to depict data and to assess patterns; 2) How correlation can be used to construct a practical model; 3) How to use a model to predict what can not be easily measured; and 4) How to use evidence to support an argument.

Docs: fulltext.pdf
Keywords: argument, evidence, models, patterns, prediction, proportion, scale, systems

What’s Stomata With You?

what's stomata with youUsing Leaf Epidermal Peels to Determine Stomatal Density

by Catherine Wade and William Callahan

This module provides an opportunity for students to observe leaf stomata and make predictions about interactions between plants and environmental conditions. After introducing students to the basic form and function of stomata and discussing photosynthesis and transpiration, students will hypothesize about the distribution of stomata on the upper and lower leaf surfaces. Then, they make wet mount slides of leaf epidermal peels to view stomata under a microscope and calculate average stomatal densities for the top and bottom of the leaf.

Fellow Catherine Wade produced this video to explain the concepts behind leaf stomata and their importance in regulating water loss in plants.

Docs: fulltext.docx   worksheet.docx
Keywords: argument, communication, data, explanations, investigations, HS-LS1.A, HS-LS1.C, math, plants, prediction, questions, stability, stomata, structure, transpiration