Why Do Water Pipes Sometimes Burst in Winter?
Cold water pipes may burst in winter when the outside temperature falls below 0°C (32 °F) and the water turns to ice. The pipe’s wa
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Expansion
When Was the Thermometer Invented?
When Was the Thermometer Invented? The first practical thermometer or instrument for measuring temperature was invented shortly before the e
What Makes Thunder?
What Makes Thunder? A bolt of lightning is a big electric spark. During a thunderstorm, electrical charges are built up in the clouds. When
Why Does an Ice Cube Float?
Why Does an Ice Cube Float? Ice cube floats because it is lighter than water. When water freezes, it increases its volume (expands) by about