Smithsonian Museums Joseph Henry A Life in Science Learn about the scientific research of Joseph Henry —first Smithsonian Secretary and renowned physicist, and how he helped set the Institution on its course. Scroll to explore this topic Meteorology Can you imagine a time when weather forecasts were not available, or when people did not know that storms followed predictable paths?
Some that accur day-to-day and others tah accur on a more rare basis.
Weather is a very broad topic but can be broken down. In my composition, I will explain three types of weather: Lightning, Ice Storms, and Hurricanes.
The reson I chose these three topics is to inform people about the different types of weather. Some of it we may already know. But there are others that we know nothing about. Lightning has been feared as an atmospheric flash of supernatural origin.
The Greeks marveled and Meteorology meteorologi essay lightning as it was hurled by Zeus. For the Vikings, lightning was produced by Thor as his hammer struck an anvil while riding his chariot across the clouds.
In the East, early statues of Buddha show him carrying a thunderbolt with arrows at each end. Indian tribes in North America believed that lightning was due to the flashing feathers of a mystical bird whose flapping wings produced the sound of thunder. Today we use a more scientific approach to explain lightning.
Lightning is a visible electrical discharge that results from the buildup of positive and negative charges within a thunderstorm.
When the buildup is strong enough, lightning appears. This discharge produces a series of brilliant flashes inside clouds, between the clouds, and between the clouds and the ground. The average time interval between each stroke is approximately 0.
Each stroke lasts, on average, 0. It is estimated that there are 2, thunderstorms occurring on earth at all times. This results in lightning strikes occurring around the world every second, totaling 8.
Lightning originates in a thunderstorm cloud where charged particles are separated. There are several theories explaining how they separate, but no one really knows what pulls the charges apart. It is believed that water drops in the cloud become negatively charged and, being heavier, fall to the bottom of the cloud.
The positive charges are then swept up to the top of the cloud by the warm updrafts in the thunderhead. As more charges separate, parts of the cloud become so highly charged that the electrical forces tear nearby air molecules apart, making more charged fragments.
There are also many types of lightning. Cloud-to-ground lightning is the most damaging and dangerous form of lightning. Most flashes originate near the lower negative charge center and deliver negative charge to the Earth.
Some suggest that cloud-to-ground lightning strikes occur most at higher latitudes. Others suggest that cloud top height is a more important variable than latitude. Forked lightning is composed of crooked or branched channels.
These bolts may discharge from a cloud to the ground, to another cloud, or out of the top or sides of a storm. This occurs when opposite electrical charges in one cloud attract those in another.
The formation of intra-cloud lightning takes place inside clouds and looks like a bright flash which flickers, to the observer. A flash may leave the cloud.
When this occurs, it resembles the cloud-to-ground lightning bolt. Storms with the greatest vertical development most often produce intra-cloud lightning.
Sheet lightning occurs when the lightning is obscured by clouds. The flashes illuminate the entire cloud, making it visible from miles away.
With sheet lightning, the observer is near enough to hear the thunder. Heat lightning is very similar to sheet lightning, except the lightning is too far away for the observer to hear the thunder.
The flashes are created by lightning bolts occurring in thunderstorms more than ten miles away. It is called heat lightning because it most often occurs during the summer, at night.Weather Essays Here we've compiled a list matching the top essays in our database against " weather essays ".
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WEATHER There are many different forms of weather on planet Earth. Some that accur day-to-day and others tah accur on a more rare basis. Weather is a very broad topic but can be broken down.4/4(1). Jul 01, · Meteorology affects us in a variety of different and diverse ways. For example, excessive rain or snow fall can result in flooding, transportation difficulties, washed out crops, and the .
Atmospheric moisture plays a significant role in weather when it changes from one state to the other. Warm air can hold more water than cold air can. A hygrometer can be used to measure humidity, which is the amount of water in the air. Predicting the weather has always been of utmost importance to our ancestors, who had to focus upon weather patterns in order to predict the weather and prepare themselves for various phenomena, especially since they had to take into account the fact that agriculture was their only means of .
Intro to Meteorology Essay Moisture in Your Everyday Life The questions on the next several pages are related to real life experiences that you have had or may encounter at some time in your life.