Tag Archives: Water
Why do we perspire?
The sweat glands help keep you cool in the summer. When we get very warm, little beads of water called sweat form on our skin. Perspiration is a quick method of cooling off the body. You can test this by wetting your hands and waving them rapidly. The water evaporates quickly and makes your hands …
What Is Hard Water?
Water that contains large amounts of dissolved minerals that make it difficult for soap to lather is called “hard water.” We usually think of water as an odorless and tasteless liquid. But drinking water for example often has a definite odor and taste. Pure water is never found in nature because water picks up and …
What is the difference between a lake and a pond?
Generally, a pond is described as a small body of still water without an outlet. Lakes are usually much larger and deeper and often are fed by rivers and streams. Generally, lakes differ from ponds in size. A lake is commonly descried as a large body of water with land all around it. A pond …
What is cement made of?
People often misuse the words cement and concrete. For example a “cement sidewalk” is really made of concrete. Cement is the fine, gray powder that is mixed with water, sand and crushed rock or gravel to make concrete. The cement and water from a paste that hardens as it dries, and binds the sand and …
What causes waves?
Water waves are caused mainly by the wind. On a windy or stormy day there are many waves in the water, and on a calm day there are fewer waves. This explains what makes most waves in the water. Winds push up waves on seas, lakes and ponds. The waves you see on a calm …
What causes rain?
You know rain falls from clouds. Have you ever wondered how raindrops happen to be in clouds? Moisture is constantly evaporated from the earth’s surface by the warmth of the sun. the invisible water vapor is carried upward by currents of warm, rising air. As the moisture-loaded air rises it cools. As the air cools, …
What are icebergs?
Icebergs are large, floating chunks of ice that have broken off from glaciers, to drift about in the ocean. Icebergs are the broken-off end of glaciers that tumble into the water and drift out into the sea. The biggest are huge, floating blocks of ice that weigh several million tons. Some are a mile or …
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