Heat from the burner radiates through the liquid and causes even heating. Due to this reason, the water at the top of the beaker the same temperature as that of the bottom. The correct option is option A.
Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.
Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source. Heat from the burner radiates through the liquid and causes even heating. Due to this reason, the water at the top of the beaker the same temperature as that of the bottom.
Therefore, the correct option is option A.
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