Chapter 4: Physical Measurements
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Chapter 4: Physical Measurements “Collecting data by recording physical properties of phenomena at or near the earth surface.”
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Chapter 4: Physical Measurements. “Collecting data by recording physical properties of phenomena at or near the earth surface.”. Where Do Physical Measurements Come From?. 1. You can take measurements directly in the field. - PowerPoint PPT Presentation
Transcript of Chapter 4: Physical Measurements
Chapter 4: Physical Measurements
“Collecting data by recording physical properties of phenomena at or near the
earth surface.”
Where Do Physical Measurements Come From?
1. You can take measurements directly in the field
2. You can take samples physical materials from the field and measure them in the lab.
3. Recreate a test environment by using a physical model.
Geodetic Measurement• What is the size and shape of the earth?• Where are features located on the earth?
Equipment Examples:“Old School” “New School”Opisometer GPS
Surveyors’ Chains Laser Range Finders
Theodolites Satellites
Clinometer Stereoscope
Physical Measurements of Earth Systems
Four Major Earth Systems:
Atmosphere
Biosphere Hydrosphere
Lithosphere
Examples of specific types of physical measurements:
Geomorphology requires knowledge of orogenesis and denudation processes
Process Knowledge is important!
Techtonic Plate MovementVolcanism
Physical / Chemical WeatheringMass movementErosion
What physical measurements might a geomorphologist make?What tools might be used?
How about other areas of physical geographic research?
• Soils• Climate• Atmosphere• Hydro• Biogeography• etc……
Physical Measurements in Human Geography
Physical TracesByproduct of useAdaptation for useDisplay of SelfPublic Message
Accretion / Deletion / Modification
Physiological / Neurological Measurements
Reactance can threaten the validity of results.
