Students conduct plant-growth experiments to discover the effects of varying concentrations of acids on plant growth and development. Common household acids such as vinegar or lemon juice could be used and compared. A variety of plants could also be used to compare results. Graphs, tables, and charts could be used to illustrate the results. This information could be organized in a portfolio format.
Students use a problem-solving model to explore alternative solutions to the problems.
They demonstrate their scientific skills and processes when they conduct and report on scientific investigations and analyses of environmental issues. The teacher and students work together to develop specific criteria that will indicate how effectively they are able to apply their knowledge to propose and compare options, and evaluate their conclusions. The teacher may wish to format the criteria as a checklist that students can use for self-assessment. These resources are those that have been evaluated since 1992. A complete list of resources to support this organizer can be found in Appendix B .