건습구습도계 Psychrometer(hygrometry)


A hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer. Dry-bulb is a ordinary thermometer. And wet-bulb is the thermometer with wet sock. Thus, wet-bulb measured a little lower due to the evaporation heat. Their difference indicates the dryness…
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화성암 Igneous Rock

Classification of igneous rocks

Igneous rocks are rocks formed from molten magma. The material is made liquid by the heat inside the Earth’s mantle. Igneous rock occurs in two ways. Slow cooling : Igneous rock formed from magma that has become solid inside the…
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