Why Does Water Put out a Fire?
Why Does Water Put out a Fire? When a fireman squirts water on the burning wall of a building, he is putting the fire out in two ways. The w
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Heat
How Does a Microwave Oven Cook Food?
How Does a Microwave Oven Cook Food? Regular ovens cook food by first heating air, which then heats the food. A microwave oven cooks by crea
Why Do We Sweat?
Sweating plays an important role in the body. It is one of the ways the body is able to cool off when we become too warm. When we exercise,
How Does a Thermometer Work?
How Does a Thermometer Work? Most thermometers are sealed glass tubes with liquid inside. A thermometer measures heat by the amount of liqui
What Is a Comet?
A comet is a huge ball of ice and space rock that orbits the sun deep in space. Occasionally, one passes near the earth and the sun. As it a