.... (like cars or planes) depend on huge amounts of fuel every year. When these fuels burn they introduce smoke and other, less visible, by-products into the atmosphere. Although wind and rain occasionally wash away the smoke given off by power plants and cars, the cumulative effect of air pollution poses a grave threat to humans and the environment. In many places smoke from factories and cars combines with naturally occurring fog to form smog. Smog has been long recognized as a potential cause of death, especially for elderly persons and those with severe respiratory ailments (like asthma). Air pollution originally resulted from lar .....

.... is the study of microorganisms. This includes protozoans, algae, fungi, bacteria, viruses, and rickettsiae. A microbiologist is a scientist who studies life forms that can only be observed by means of a microscope. Microbiologists use many criteria to classify bacteria. The Beginning of Microbiology Zacharias Jansen created the microscope. Although Robert Hooke is the one who made it widely known. In 1665 Hooke published a book called Micrographie. It contained his thoughts on chemistry as well as a description and list of uses for a microscope. With this he opened the door to microbiology. For the first time the world was able to .....

.... can grow to be 30 feet long. The pilot whale is also considered a dolphin. Dolphins were once hunted by commercial boats for the small amount of oil that can be extracted from their body. This oil is used to lubricate small parts in watches. Cheaper oils have been found, so dolphins are not hunted for this reason anymore. Dolphins can be caught in tuna nets by accident. Since dolphins have to breath at the surface they drown in tuna nets. It is estimated that 4.8 million dolphins were killed in tuna nets from 1959 to 1972. Under pressure from animal rights activists tuna consumers will not accept tuna from canners that do not protect dol .....

.... stories with frequent shifts of scene. One difference between waking and dreaming consciousness is that the latter tends to be an internal hallucinatory-like experience disconnected from the external world. Many dreams collected in laboratories are rather common, but some people tend to experience some bizarre dreams. Early in the 20th century, Sigmund Freud believed that dream content was composed of the mental processes different from that used in the awake state. He believed this was what dominated the dreaming mind. He described this "process" as characterized by more primitive mechanisms, by rapid shifts in energy and em .....

.... to heroin or cocaine. When a person smokes a cigarette the body reacts immediately to the chemical nicotine. Nicotine begins to effect a smoker’s blood pressure, the flow of blood from their heart, the heart beat and breathing rate. Cigarette smoke also contains carbon monoxide, the same poisonous gases released from a car exhaust pipe. Carbon monoxide is a colorless and odorless, highly toxic gas that reduces the amount of oxygen that the blood can carry. Combined with the effects produced by the nicotine, it creates an imbalance in the demand for oxygen by the cells and the amount of oxygen the blood is able to supply. .....

.... sulfuric acid and nitric acid, and the air current can send them thousands of miles from the source. When the acids fall to the earth in any form it will have large impact on the growth or the preservation of certain wildlife. NO DEFENSE Areas like Ontario, Canada, mainly southern regions that are near the Great Lakes, have substances such as limestone or other known antacids that can neutralize acids entering the body of water thereby protecting it. However, large areas of Ontario that are near the Pre-Cambrian Shield, with quartzite or granite based geology and little top soil, do not posses enough buffering capacity to neu .....

.... covered with diatoms. Humpback whales have 14-35 throat grooves that run from the chin to the navel. These grooves allow their throat to expand during the huge intake of water during filter feeding. They have small, round bumps on the front of the head edging the jaws. Humpbacks have huge, mottled white flippers with rough edges that are up to one-third of its body length; these are the largest flippers of any whale. The humpback's genus, Megaptera, means "huge-wings," referring to its flippers. The flippers may have barnacles growing on them. The deeply-notched flukes are up to 12 feet (3.7 m) wide. Humpbacks have a small dor .....

.... tasks or a certain amount of time. „h Trouble with following instructions. „h Often losing things for needed tasks. Impulsiveness of the disorder may include the following: „h Acting before thinking - this may lead to failing academically or friction in social relationships. „h Difficulty in waiting turns, interrupting or intruding on conversations/games. Examples of hyperactivity will be seen through the child often fidgeting or squirming in their seats. The will be described as being "on the go" or acting as if "driven by a motor". Many other symptoms like quick shifts of moods temper outbursts, and problems with getting along .....

.... 200cm3 with a surface area of 160cm2 and a surface area to volume ratio of 1.25:1, will loose heat at the same rate as a similar flask of volume 625 and a surface area of 500 which also has a surface area to volume ratio of 1.25:1. However, generally when you increase the size of an object the surface area to volume ratio decreases so in this example it is very likely that the two flasks in question are different shapes. In this experiment the two flasks which will be used will different surface area to volume ratios as follows: 100 cm3 flask: Volume = 100, Surface Area = 115. Surface Area to Volume Ratio = 115 ---- : 1 = 1.15 .....

.... have been missed as hoaxes and human misconceptions. Humans have mistaken "meteor trails, comets, odd shaped clouds, balls of lightning, burning marsh gases, airplanes, lights of cars, birds, and many other objects as UFOs," (Kraske 22). Pranksters have also misled UFO investigation by doing actions that confuse and mislead humans. For example, they flash images of car headlights and city lights on the Earth. Pranksters also confuse people by tossing discs from tall buildings and taking pictures of spaceship models. One man was suspected of taking pictures of a realistic chicken-hatching machine. Human psychology has also played .....