Students are tasked with answering the question “What can we do to help lower or eliminate the causes/effects of Acid Rain, Air Pollution, Water Pollution and Deforestation?” They form groups in which students take the role of a chemist, economist, biologist, or medical researcher in order to create a project that will answer some facet of this question with mathematical support from each field of study represented by the group.

CCSS Alignment for Grades 6-9

6.RP.1. Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities. Students will use ratio language to explain the relationship between deforestation, for example, and CO2 levels in the earth’s atmosphere.

7.RP.3. Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error. Students will express proportional relationship between air pollution and acid rain, for example, in terms of percent increase or decrease.

8.SP.4.Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables. Students will investigate patterns of association between air and water pollution in specific geographic locations using relative frequencies to describe possible association.

S-IC.5. Use data from a randomized experiment to compare two treatments; use simulations to decide if differences between parameters are significant. Use water treatment data, for example, from two different sites to decide if water pollution shows significant change between locations.

## Resource

http://pbl-online.org/CoLab/PBLCL-External.ViewCompleteProject.php?projectId=748

## Summary

## Students are tasked with answering the question “What can we do to help lower or eliminate the causes/effects of Acid Rain, Air Pollution, Water Pollution and Deforestation?” They form groups in which students take the role of a chemist, economist, biologist, or medical researcher in order to create a project that will answer some facet of this question with mathematical support from each field of study represented by the group.

## CCSS Alignment for Grades 6-9

6.RP.1.Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.Students will use ratio language to explain the relationship between deforestation, for example, and CO2 levels in the earth’s atmosphere.7.RP.3.Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.Students will express proportional relationship between air pollution and acid rain, for example, in terms of percent increase or decrease.8.SP.4.Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables.Students will investigate patterns of association between air and water pollution in specific geographic locations using relative frequencies to describe possible association.S-IC.5.Use data from a randomized experiment to compare two treatments; use simulations to decide if differences between parameters are significant.Use water treatment data, for example, from two different sites to decide if water pollution shows significant change between locations.