Temperature and its Measurement: questions with answers

Temperature is used because it is the reliable measure of hotness or coldness of a body. A thermometer measures temperature, so it helps decide how hot or cold the body is.

First identify the missing step in the sequence. After the final reading, wash the tip with soap and water. Contact with the mouth can leave germs on the tip, even when it was clean before use.

Digital clinical thermometers need contact with the body. Infrared thermometers can measure body temperature from a distance. The need for contact depends on the thermometer type.

The scale of a laboratory thermometer is marked in degree Celsius. The unit of temperature here is degree Celsius, written as °C. Saying only degree does not name the scale, and saying only Celsius leaves out degree. So the reading is 27.0 °C and the unit is degree Celsius.

The temperature must be read with the eye directly in line with the level of the liquid column. Looking from above or below the level is not the correct way to read the thermometer.

The correct procedure is to keep the eye directly in line with the level of the liquid column. Moving the eye to the top or bottom of the thermometer, or removing the thermometer, does not follow this rule.

Readings of boiling water taken by different students may differ if the correct way of reading temperature was not followed by all students. The correct way is to keep the eye directly in line with the level of the liquid column.

The thermometer reading is taken from the Celsius mark with which the top level of the liquid column coincides. The drawing has the top level at 19 °C, but it should show 18.5 °C. The correction is to move the top level of the red liquid column to 18.5 °C.

The reading must be taken from the Celsius mark with which the top level of the liquid column coincides. The student's value does not use that top level. The correct reading point is the top of the column, which coincides with 27.5 °C.

The usual laboratory thermometer range is -10 °C to 110 °C. Thermometer A has both of these limits, so it matches the usual range.

The observation given for boiling water is that its temperature remains constant while it is boiling. Heating is still continuing, but the thermometer reading does not keep rising during boiling.

The observation is that the temperature of ice remains constant while it is melting. So the later thermometer reading should remain the same as the first reading during melting.

The stated observation is that the temperature of water remains constant while it is boiling. The same reading is not because the burner stops or because the thermometer cannot be used; it follows the boiling-water observation.

A room thermometer gives an approximate idea of room temperature. Air temperature is monitored at weather stations all over the world, and this air-temperature data is used for making weather forecasts.

A room thermometer gives an approximate idea of room temperature. It is not described as giving exact weather-station data or making a complete weather forecast.