Handout
Ohio State University

Ohio State Univ.: Cell Expansion and Differentiation

For Students 9th - 10th
This essay is complemented by useful illustrations of how plant cells enlarge after mitosis and become specialized for different functions. A good supplement to plant growth studies.
Article
USA Today

Usa Today: Understanding Air Density and Its Effects

For Students 9th - 10th
In simple terms, density is the mass of anything - including air - divided by the volume it occupies. In the metric system, which scientists use, we usually measure density in terms of kilograms per cubic meter. The air's density depends...
Handout
University of Illinois

University of Illinois Urbana Champaign: Observed Dew Point Temperature

For Students 9th - 10th
Describes what dew point is and how it relates to moisture content of the air. Also explains condensation and relative humidity.

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