Ged Science Exam For Exam Preparation

GED Science Exam FOR EXAM PREPARATION.The following symbols represent a shortcut for representing an element. For example, O stands for oxygen, H for hydrogen, and C for carbon. H2O is the formula for water. The subscript 2 in the formula indicates that there are two atoms of hydrogen in a water molecule. If there is no subscript after a symbol, the subscript is assumed to be one. Therefore, one molecule of water contains three atoms: two hydrogen atoms and one oxygen atom. Based on the information, how many atoms are represented in C12H22O11? A. 3 B. 11 C. 12 D. 22 E. 45 Cholera is a disease caused by a bacterium that is transmitted by water, shellfish, and raw vegetables. The major symptom is severe diarrhe a. Epidemics of cholera in the Americas, common in the 19th century, are much less frequent now with the advent of modern medicine and improved methods of hygiene. However, in 1991, the number of cholera epidemics increased again in one South American country, causing over 4000 deaths. The high number of cases of cholera in the South American country noted above was most probably due to which factor? A. prolonged smoking of cigarettes B. lack of variety in foods C. poor water and sewage treatment D. eating the wrong kinds of foods E. widespread overuse of antibiotics Making products from recycled materials, such as aluminum cans, glass, and plastic usually saves energy and other resources. For example, it takes about 75% less energy to make steel from scrap than from ore. All forms of recycling involve some energy to produce the recycled materials, a process that also results in the production of some pollution.