Answer the following question given this paragraph: One useful application of PET scanning is in the diagnosis of Alzheimer's disease. This debilitating condition associated with memory loss primarily occurs in elderly individuals. A protein known as beta-amyloid gradually forms deposits, or plaques, in the brain. Severe memory loss and impaired movement appear to be direct results of the plaque growth. Q: Alzheimers disease is associated with memory loss in what group of people? Choices: - juveniles - prehistoric - immigrants - elderly A:
elderly
(Question)
Answer the following question given this paragraph: Appendix: Periodic Table of the Elements In this chapter, we present some data on the chemical elements. The periodic table, introduced in Chapter 3 "Atoms, Molecules, and Ions", lists all the known chemical elements, arranged by atomic number (that is, the number of protons in the nucleus). The periodic table is arguably the best tool in all of science; no other branch of science can summarize its fundamental constituents in such a concise and useful way. Many of the physical and chemical properties of the elements are either known or understood based on their positions on the periodic table. Periodic tables are available with a variety of chemical and physical properties listed in each element's box. What follows here is a more complex version of the periodic table than what was presented inChapter 3 "Atoms, Molecules, and Ions". The Internet is a great place to find periodic tables that contain additional information. One item on most periodic tables is the atomic mass of each element. For many applications, only one or two decimal places are necessary for the atomic mass. However, some applications (especially nuclear chemistry; see Chapter 15 "Nuclear Chemistry") require more decimal places. The atomic masses in Table 17.1 "The Basics of the Elements of the Periodic Table" represent the number of decimal places recognized by the International Union of Pure and Applied Chemistry, the worldwide body that develops standards for chemistry. The atomic masses of some elements are known very precisely, to a large number of decimal places. The atomic masses of other elements, especially radioactive elements, are not known as precisely. Some elements, such as lithium, can have varying atomic masses depending on how their isotopes are isolated. The web offers many interactive periodic table resources. For example, seehttp://www. ptable. Q: What organizational tool, arguably the best in all of science, lists all the known chemical elements, arranged by atomic number? Choices: - tide table - logic table - spreadsheet - periodic table A:
(Answer)
periodic table
Ques: Answer the following question given this paragraph: A: Both boxes have the same volume because they are the same size. However, the books have greater mass than the feathers. Therefore, the box of books has greater density. Q: What third property is different if two boxes have the same volume but one has greater mass? Choices: - oxygen - output - diameter - density A:
Ans: density
(Q).
Answer the following question given this paragraph: Digestion includes both mechanical and chemical processes. Mechanical digestion is a purely physical process that does not change the chemical nature of the food. Instead, it makes the food smaller to increase both surface area and mobility. It includes mastication, or chewing, as well as tongue movements that help break food into smaller bits and mix food with. Q: Which form of digestion is a purely physical process that does not change the chemical nature of the food? Choices: - slow - simple - electromagnetic - mechanical A:
(A).
mechanical
Ques:Answer the following question given this paragraph: Q: What is the scientific term for the act of eating or feeding? Choices: - secretion - excretion - swallowing - ingestion A:

Ans:ingestion
Ques:Answer the following question given this paragraph: This is how ice wedging works. When liquid water changes into solid ice, it increases in volume. You see this when you fill an ice cube tray with water and put it in the freezer. The ice cubes go to a higher level in the tray than the water. You also may have seen this if you put a can of soda into the freezer so that it cools down quickly. If you leave the can in the freezer too long, the liquid expands so much that it bends or pops the can. (For the record, water is very unusual. Most substances get smaller when they change from a liquid to a solid. ). Q: Do most substances increase or decrease in size when they change from a liquid to a solid? Choices: - increase - stay the same - it is unable to be measured - decrease A:

Ans:
decrease