GED Science Exam
The following symbols represent a shortcut for representing an element. For example, O stands for oxygen, H for hydrogen, and C for
... [Show More] 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.
The chart at the left shows the energy savings from recycling.
When Anil is at the grocery store, he can choose to buy juice in a glass bottle, an aluminum can, a plastic jug, a juice box (paper), or foil-covered juice container.
If Anil's community requires that he recycles, which container would provide the MOST overall energy savings?
A. aluminum can
B. plastic jug
C. waxy, cardboard juice box
D. glass bottle
E. foil-covered container [Show Less]