PALS - Examples of Student Work

ME405: Wet-Dry Bulb Hygrometers: Measuring Relative Humidity and Apparent Temperature

Examples of Student Work

Contributed by: Council of Chief State School Officers (CCSSO)
There is one example for each score point ranging from 4 down to 1. Explanations of the scores were written by staff from American College Testing (ACT) who conducted training and scoring of field tested events. Comments in the "Enhancement Required" box suggest how the response might be improved to receive a higher score.

Item 1 - Event Score = 4

Citation and Explanation		Enhancement Required
215 - 212 = 3 "I did this to find the difference between 215 & 212."	The response shows all the correct work, with explanation, needed to determine the correction factor.	(None required.)
" The actual temperature of the hot gas = 372 F." 375 - 3 = 372	The correct actual temperature is calculated and shown in the answer space.	(None required.)

Item 2 - Event Score = 4

Citation and Explanation

Enhancement Required

Shown In table 5:

Air P = 28.00

Cloud Cov = 100

Amt Prec. = 1.5

"I figured out the amount of rain by how high the relative humidity. I thought this because of tabe 4."

"...I looked at day 7 on table 4, it led me to that prediction."

"Also for the cloud cover I thought is the relative humidity is so high."

"More water vapor would be in the air and cooling to form clouds."

All predictions correlate with the data in the table.

Response includes multiple references to data in table 4 for predictions of precipitation, air pressure, and relative humidity.

Connections are described between cloud cover and relative humidity;

Concept of cloud formation is discussed.

None required.

Item 1 - Event Score = 4

Item 2 - Event Score = 4

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