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Scientific Method Deforestation in Rhondonia Brazil Observation In one of the major regions of deforestation the province of Rhondonia Brazil the rainfall has been severely and or completely stopped Theory As the tropical rainforest of Rhondonia Brazil is leveled for farmland rainfall is significantly and directly reduced Rainfall is reduced because there are fewer trees to return water vapor to the air through tree transpiration or water evaporation through trees Relative humidity is the amount of water vapor in the air compared with the amount of vapor needed to make the air saturated at the airs current temperature The point past saturation is precipitation or rainfall If deforestation is the cause of decreased rainfall then decreased average relative humidity will be evident Experimental Design In order to isolate deforestation as the primary factor causing decreased rainfall tests will be conducted to measure relative humidity A sling psychrometer will be used to gain these measurements httpwwwtaftancomthermodynamicsHYGROMTHTM It is used to measure the amount of moisture in the air The dry-bulb thermometer measures the air temperature and the wet-bulb measures the lowest temperature that can be obtained by evaporating water into the air at constant pressure A calculator will be used to convert to relative humidity httpwwwsrhnoaagovelpwxcalcrhhtml El Paso National Weather Service Offices weather calculator This converter will take the wet-bulb temperature the air temperature and the current uncorrected pressure and calculates the relative humidity and dewpoint Please enter your air temperature and then choose either Fahrenheit or Celsius Fahrenheit Celsius Please enter your wet-bulb temperature and then choose either Fahrenheit or Celsius Fahrenheit Celsius Please enter your actual station pressure not sea level pressure and then choose either millibars or inches of Mercury Millibars Inches of Mercury Relative humidity measurements will be taken every day for one
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