What chemicals are used in thermometers?

The two liquids that are typically used in a thermometer are mercury or alcohol. The alcohol in thermometers is dyed red to be easier to read, while mercury has a silver

Can crickets be used as thermometers?

It has long been known that crickets chirp at different rates depending upon the temperature. While calculating temperatures based on this is not ideal, it can serve in a pinch if you find yourself without a thermometer—and provided it's not the dead of winter. The general rule is to count how many times a cricket chirps during a 14-second interval. Add 40 to that figure, and the result is degrees in Fahrenheit. If you have more patience, count the number of chirps over the period of one minute. Take the number of chirps you hear, subtract 72, divide by 4, and add the result to 60, which gives you the degrees in Fahrenheit ([chirps - 72] / 4 + 60 = degrees F). For example, if you hear 68 chirps, then 68 minus 72 equals -4, divided by 4, equals -1. Add this to 60 and the result is 59°F.

color. Both liquids work well in determining temperature, but alcohol thermometers are safer. Should a mercury thermometer break or leak, the liquid metal inside could evaporate and the fumes are toxic; also, mercury tends to expand or contract more slowly than alcohol. Mercury, furthermore, can't measure temperatures below -38°F (-38.9°C) because that is the point at which it turns into a solid. The disadvantage of alcohol, however, is that it tends to evaporate or polymerize over time.

What are thermographs and hygrothermographs?

A thermograph is a device that records changes in temperature over time by drawing a line over a rotating chart in a manner similar to a seismograph. A hygrothermograph does the same thing, except it also indicates levels of humidity.

Does Alaska get hotter than Hawaii?

Strangely enough, the two states are currently tied. Hawaii, though located in the tropics, enjoys very moderate temperatures due to favorable winds and the islands' topography. The mountainous parts of this fiftieth state can actually get very cold, and the tops of Mauna Kea and Mauna Loa receive snowfall regularly. While the average temperatures across the state of Hawaii are higher than in Alaska, the islands have fewer extremes. Alaska's interior region can get very warm indeed, sometimes reaching 90°F (32°C). The highest temperature in Alaska thus far recorded is 100°F (37.8°C), which was measured at Ft. Yukon on June 27, 1915. On April 27, 1931, Pahala, Hawaii reached the same extreme.

Does the North Pole have the same average temperatures as the South Pole?

One might think that the northern and southern extremes of the planet would have comparable annual temperatures. In actuality, the South Pole is much colder. This

What is a swamp cooler?

A swamp cooler is an alternative to a traditional air conditioner. A traditional air conditioner uses compressed Freon gas to cool the air. This system works very well in most climates where the humidity is above 30 percent. In drier climates (below 30 percent humidity) a swamp cooler is very effective. Also called an evaporative cooler, a swamp cooler works sort of like a wet bulb thermometer. Pads inside the cooler absorb water, and a fan then blows on the pads, cooling the air and making it more humid. Swamp coolers are more energy efficient that regular air conditioners because the only electricity needed is what is used for the fan; no compressor is required.

is because giant glaciers have built up on the continent of Antarctica, where the South Pole is located. The inland ice sheets of Antarctica are 8,036 feet (2,450 meters) thick on average, and this thick layer of ice keeps the South Pole about 50°F (23.6°C) colder than in the North.

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