What Do Concentrations Mean?

It doesn’t necessarily take a large quantity of a substance to have a significant effect. Contaminants in water and greenhouse gases in Earth’s atmosphere are commonly measured in parts per million (ppm) or parts per billion (ppb). In this activity, students explore how many dilutions of a pure substance (food coloring) are needed to produce a 1 part per million concentration.

Clicking the link below will download a Word (.DOC) file.

What Do Concentrations Mean?

California Education and the Environment Initiative

California Education and the Environment Initiative is free, state-sponsored K-12 curriculum that teaches science and history-social science standards through an environmental lens.

California CGS Map Presentation Guideline

This guide helps pre-college teachers use the geological map of California in their classroom. The beautiful maps found here can give valuable information when correctly interpreted. Explore the features of the maps and ask questions to stimulate exploration and curiosity.

Clicking the link below will download a Word (.doc) file.

California CGS Map Presentation Guideline

Exploring Earth: An Interactive High School Textbook

Learn about the many Earth systems in this interactive, web-based textbook. Chapters include matter, dynamic systems like volcanoes and plate tectonics, hydrosphere, atmosphere, the local space system, and Earth history.

Exploring Earth