Oral Biology Departement Descriptive Dental Anatomy Q Bank HPT 121 Q Bank HPT 121 I- Put (√) or (X) in front of each sentence and correct the wrong sentence. 1- The distal cusp is the smallest cusp in the occlusal surface of the lower 1st permanent molar. ( ) 2- The lower third molar has no distal contact area. ( ) 3- The three buccal cusps of
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Essay Two: Causes and Effectives of Air Pollution Nowadays‚ air pollution is becoming one of the most major concerns throughout the world. There are several causes such as burning fossil fuels‚ emission of pollutants‚ smoking and transportation which contribute in developing air pollution. These causes may lead to several difficulties on the environment‚ such as health problems‚ acid rain and global warming. One of the most important effects of air pollution is bringing on breathing problems‚ such
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Causes And Effects Of Noise Pollution Noise can be defined as an unwanted or undesired sound. Decibel is the standard unit for measurement of sound. Usually 80 db is the level at which sound becomes physically painful. And can be termed as noise. Humans‚ animals‚ plants and even inert objects like buildings and bridges have been victims of the increasing noise pollution caused in the world. Be it human or machine-created‚ noise disrupts the activity and balance of life. While traffic dons the
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Water Pollution Water pollution involves any contaminated water‚ whether from chemical‚ particulate‚ or bacterial matter that degrades the water’s quality and purity. Water pollution can occur in oceans‚ rivers‚ lakes‚ and underground reservoirs‚ and as different water sources flow together the pollution can spread. Causes of water pollution include: * Increased sediment from soil erosion * Improper waste disposal and littering * Leaching of soil pollution into water supplies *
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beings. Pollution is dangerous and harmful to both living things and the environment. Chemical waste‚ fertilizer and numerous additional are one of the most important affect which is leading us to damaging possessions of water pollution‚ Pollution should be condensed in order to make available a cleaner environment and generate healthy living environment and habitat for all life forms on earth. Water pollution also contains a distinct definition unlike the broad definition for pollution. The unambiguous
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Air Pollution - The Causes & Effect . Defi-Air pollution‚ both indoors and outdoors‚ poses health risks to millions of Americans every day‚ contributing to asthma‚ emphysema‚ heart disease‚ and other potentially lethal conditions. Managing air pollution causes‚ and defending successful safeguards like the Clean Air Act‚ is critical to the human‚ economic‚ and environmental health of our communities. America’s power plants are our biggest industrial polluters. Each year they pump more
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Air Pollution: Causes and Effects It keeps us alive but at the same time‚ it can also be harmful. We breathe air everyday. Air provides us with oxygen that is essential for living. Nitrogen‚ water vapor‚ and inert gases comprise air along with oxygen. Emission of substances that contaminate air results to pollution. Air pollution is both natural and human-based. Natural air pollution is caused by phenomenon such as volcanic eruption‚ wind erosion‚ decomposition and radioactive
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Air pollution is a major problem facing our environment today. This dilemma is harmful to every living creature on this planet. How can we limit the causes of air pollution? There are industrial as well as residential causes of air pollution. We need to limit the effects of air pollution. We all know it affects the environment‚ but it also can affect us directly. Air pollution needs to be controlled. Air pollution can be defined as pollution in the air. It is all around us. It might not be as clearly
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Pollution is the introduction of contaminants into the environment. It is cause mostly by human actions‚ but can also be a result of natural disasters. Pollution has harmful effect on living and non-living things in an environment‚ making it difficult to maintain life. There are different types of pollution. The main ones are: 1. Air pollution 2. Water pollution 3. Land pollution 4. Noise pollution Air pollution Air pollution is the accumulation of pollutants into the atmosphere that have
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Land pollution Land pollution is the deterioration (destruction) of the earth’s land surfaces‚ often directly or indirectly as a result of man’s activities and their misuse of land resources. It occurs when waste is not disposed of properly‚ or can occur when humans throw chemicals unto the soil in the form of pesticides‚ insecticides and fertilizers during agricultural practices. Exploitation of minerals has also contributed to the destruction of the earth’s surface. There are many effects
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