How to determine air temperature by the frequency of cricket chirping? Detailed answer

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How to determine air temperature by the frequency of cricket chirping? Detailed answer

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How to determine air temperature by the frequency of cricket chirping?

The sounds of crickets are caused by the friction of their wings or legs against each other - this is how males call females. By the frequency of chirring, you can determine the temperature of the air. To do this, you need to count the number of sounds in 25 seconds, divide by 3 and add 4 to the result - you get the temperature in degrees Celsius. The formula works correctly only above 10°C, because at lower temperatures crickets are rarely disposed to love games.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Were the continents ever one?

Look at the world map. Now look at South America and Africa. Do you see the bulge in the outline of South America on the right where Brazil is, and the depression in the outline of Africa on the left? Don't you think that they can be put together, and one continent will come out of them? Well, 50 years ago, a German scientist named Alfred Wegener did just that. He wrote: "One who studies the opposite shores of the South Atlantic should be a little surprised by the similarity of the coastlines of Brazil and Africa. Each protrusion from the side of Brazil corresponds to a depression of a similar shape from the African side."

Wegener also learned that naturalists had studied the prehistoric plant and animal life of South America and Africa and found many similarities. This convinced him that the two continents were once one, and then parted. He formulated a theory that was called the theory of the movement of continents. According to this theory, land masses on Earth were once united into one whole continent, which had its own rivers, lakes, and inland seas. Then, for unknown reasons, this array began to break apart. South America broke away from Africa and went to the side. North America broke away from Western Europe and went west. This is how the continents as we know them today were formed.

Did everything really happen as Wegener suggested? We do not know. This is just a theory. But, as you can see on the map, there is some evidence for this. The study of prehistoric plants and animals also suggests that this is possible. In addition, the earth's crust is moving today. So maybe Wegener was right!

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