One of the primary tools that demographers use to understand population is the age structure diagram, a graphic representation that shows the distribution by ages of females and males within a certain population. This...
This lesson reinforces the idea that Earth's population, including the population of the United States, is growing at a dramatic rate. It discusses some of the basics of demography, the study of population and its...
This lesson summarizes our dependency upon fossil fuels, pointing out that there are very few aspects of our daily life that are not impacted by their use. The discussion centers around whether these fuels could be...
This lesson provides an introduction to the occurrence and possible risks of household chemical products. Topics include some basic chemistry (how elements combine to form compounds), how chemicals are classified, and...
This lesson introduces students to the concept of toxic chemicals. Topics include a definition of the term 'toxic', factors that can affect the potential for a chemical to be harmful, and a brief overview of federal...
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