Praxis Earth and Space Sciences case studies
Praxis Earth and Space Sciences · Put your knowledge to work in context.
The Praxis Earth and Space Sciences assessment is a subject test used by states and educator-preparation programs as one piece of evidence that a candidate has the content knowledge to teach Earth and space science at the secondary level. Most candidates are pre-service teachers finishing a geoscience, geology, or science-education program, career changers with a science degree, or certified teachers adding an endorsement. The Praxis Earth and Space Sciences case studies are 5 cases and about 3,048 words.
1Borehole Correlation, a Truncated Dike, and a Conflicting K–Ar Age
A regional geologic map shows a faulted sedimentary basin. Two exploratory boreholes lie 2.4 km apart along a north–south transect.
694 words, about 3 min2Rain-Triggered Bluff Failure Above a Clay Layer
Dover Bluff is a 22 m high coastal bluff composed of 18 m of sandy till overlying 2 m of stiff glaciolacustrine clay and 2 m of beach sand. Twelve houses sit 10–14 m from the lip.
579 words, about 3 min3Is the Coastal Well Contaminated by Seawater or Road Salt?
Since 2018, a coastal town has pumped 2.1 million m³ per year from a confined sand aquifer 45–65 m below sea level, 350 m inland. Chloride in well MW-4 rose from 42 mg/L in January to 285 mg/L in September; bromide rose from 0.08 to 0.11 mg/L; the Cl/Br mass ratio is about 2,600.
583 words, about 3 min4Winter Storm Forecast with a Warm Nose and Cold Roads
At 0600 UTC a winter storm is forecast for a city. The 1200 UTC sounding shows surface temperature -1.5°C and dew point -4.0°C; a warm layer from 900 to 800 hPa peaks at +2.8°C; above 800 hPa the profile is below freezing, and the surface-based cold layer is 450 m deep.
623 words, about 3 min5Using Student Moon Observations to Confront a Phase Misconception
An eighth-grade class of 26 students recorded the Moon's phase and position at 8:00 p.m. local time for 30 consecutive days.
569 words, about 3 min