Temperature Laurel Cook Air temperature is measured by a mercury thermometer, which uses the principle of contraction and expansion. When the temperature rises, the mercury expands and rises in the thermometer tube.
Cold weather makes the mercury contract and fall.
The center of the sun is thought to be 40 million degrees Celsius . The Celsius, or centigrade, scale is used by the World Meteorological Organization and most countries in the world. 212 Zero on the Fahrenheit scale represents the temperature produced by the mixing of equal weights of snow and common salt. The Learning Network Inc. All rights reserved. Inc. All Rights Reserved.