.... about their sleep. The currently accepted definition, to become known as DIMS (Difficulty Initiating or Maintaining Sleep). Several surveys have tried to pin down the exact cause of sleep problems. Of 1,000 households, one third had someone with current problems and in 42 percent someone had suffered from sleep disorders at sometime. Some doctor's polls have been revealing yet somewhat disparate. In one survey, roughly 19 percent of the patients seen by the 3,000 doctors had complaints of some type of . That figure may actually understate the case, for some say that more .....

.... This process has been occurring for roughly about 3.8 billion years. The mantle is about 2900 km. thick, which lies above a layer of molten magma that still exists today. The immense heat from the magma (approximately 2700(C) causes convection in the mantle (Figure 1). Convection is caused by non-uniform temperature in a fluid and density differences. This continuous convection is the cause of plate movement. Each complete cycle, called a convection cell, drives the plate in the direction of the cell. How does a 'solid' mantle move? The mantle may be solid but, .....

.... fiber increasing their bulk. Many athletes turn to steroids more often because they're cheaper then marijuana or cocaine. A ten week cycle of testosterone cypinate and methandrostone costs only about one hundred dollars. Steroids are also very hard to trace because of their water base composition. They can pass through the body within two days. All these benefits of steroids help an athletes become more competitive and increase their chance of being a winner. Of course everybody wants better biceps and triceps but when using steroids to achieve this goal there i .....

.... Therefore, the huge variety of colors we see are a response to different compositions of wavelengths of light. The rods are responsible for encoding white and black. results when one or more of the cone cells fail to function properly. One of the visual pigments may be functioning abnormally, or be absent altogether. There are several different types of , however, complete , or achromatopsia, is probably the simplest to understand. This is the rarest form of . This is when no colors can be seen at all. The color receptors are almost completely gone in this f .....

.... be using electricity in your lab. Never touch an electrical socket or appliance with wet hands. 8. The symbol that looks like a duck means that you will be working with live animals. Analysis and Conclusion: 1. The person is not wearing safety goggles and he isn't really paying close attention. Safety goggles are vital when you are working with fire. 2. She is pointing the vial towards herself. Whenever you are working with heating liquids, the vial should never pointing towards you. 3. The person is heating a liquid with a top on the beaker. Whenever you are heatin .....

.... in point-source pollution control have yielded no statistically significant pattern of improvement in dissolved oxygen levels in water in the last 15 years. It may be that we are only keeping up with the amount of pollution we are producing. (Knopman, 1993) The early biosphere was not pleasant for life because the atmosphere had low levels of oxygen. Photosynthetic bacteria consumed carbon dioxide and produced simple sugars and oxygen which created the oxygen abundant atmosphere in which more advanced life forms could develop. (Brown, 1994) The mystery of how Earth's ox .....

.... Poor construction techniques and operating practices caused many of them to be unsuccessful and production inconsistent. How is the quality of the food today affected by the methods of Hydroponics of today? Body The growing media that is used for gardening greatly effects the production of the plants. If sand is used as a medium it should be tested thoroughly for any residue that might cause infected growing medium. The sand should be cleaned at least every three of four weeks. Leaching is also a major step, it is to be done at t .....

.... in the house that was once built, you can thank a botanist for it all. Many people, such as myself, would wonder why someone would want to be a botanist. The main reason anyone can name is that plants have intrigued people for thousands of years. Plants are used for decoration, as well as our basic needs, such as: food, shelter, and even the air we breathe. Today, our world requires new needs for plants. Increasing human population is linked to gigantic environmental problems. Among them is the need for more food to feed the world. Pollution of both air and water is be .....