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  • absolute-humidity
Dripping Wet or Dry as a Bone?
Read the Fine Print
Educational Use
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Students use a sponge and water model to explore the concept of relative humidity and create a percent scale.

Subject:
Applied Science
Atmospheric Science
Engineering
Physical Science
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Amy Kolenbrander
Daria Kotys-Schwartz
Denise W. Carlson
Janet Yowell
Malinda Schaefer Zarske
Natalie Mach
Date Added:
10/14/2015
Weather Watchers
Read the Fine Print
Educational Use
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Students are introduced to some essential meteorology concepts so they more fully understand the impact of meteorological activity on air pollution control and prevention. First, they develop an understanding of the magnitude and importance of air pressure. Next, they build a simple aneroid barometer to understand how air pressure information is related to weather prediction. Then, students explore the concept of relative humidity and its connection to weather prediction. Finally, students learn about air convection currents and temperature inversions. In an associated literacy activity, students learn how scientific terms are formed using Latin and Greek roots, prefixes and suffixes, and are introduced to the role played by metaphor in language development. Note: Some of these activities can be conducted simultaneously with the air quality activity (What Color Is Your Air Today?) of Air Pollution unit, Lesson 1.

Subject:
Applied Science
Atmospheric Science
Engineering
Physical Science
Material Type:
Activity/Lab
Lesson Plan
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Amy Kolenbrander
Denise Carlson
Janet Yowell
Malinda Schaefer Zarske
Natalie Mach
Date Added:
09/18/2014
hx Diagram (Mollier)
Unrestricted Use
CC BY
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Interactive hx diagram (Mollier) for displaying the changes in state of humid air at sensible temperature change, wet cooling, mixture air, humidification and custom state points.
Automatic calculation of the required heat flow for cooling and heating. Free online tool, no registration required.

More detailed information:
To analyze changes of state of moist air normally a diagram with the specific enthalpy as the ordinate and the humidity ration as the abscissa is used. This specific type of diagram was proposed in 1923 by the German professor of applied physics and mechanics, Richard Mollier.
The Mollier diagram is respectively created for a certain constant pressure, usually the atmospheric pressure (p≈1bar).
The thermodynamic properties of moist air are represented in the state diagram as lines of constant state variables - so-called isolines.

Subject:
Applied Science
Engineering
Mathematics
Measurement and Data
Physical Science
Physics
Material Type:
Diagram/Illustration
Interactive
Date Added:
03/10/2021