Global Change: Where Land, Air and Water Meet
Global Change: Where Land, Air and Water Meet Activity Source: USGS Global Change Education
Objective The atmosphere is a mixture of gases. Similarly, the world’s oceans and fresh waters contain dissolved chemicals. Many substances dispersed in air or water are measured in parts per million. Some of these substances are colorless, odorless, and tasteless, yet even in small quantities they can be toxic.
To develop an understanding of parts per million as a concept, teams of students will create successive dilutions of a solution to reach a parts-per- million concentration.
[Read More]