Answer the following question given this paragraph: Carolus (Carl) Linnaeus (1707-1778) ( Figure below ) built on Aristotle's work to create his own classification system. He invented the way we name organisms today, with each organism having a two word name. Linnaeus is considered the inventor of modern taxonomy , the science of naming and grouping organisms. Q: What is the name of the science that is concerned with naming and grouping organisms? Choices: - geology - methodology - biology - taxonomy A:
taxonomy
(Question)
Answer the following question given this paragraph: Crystallization separates mixtures based on differences in solubility, a measure of how much solid substance remains dissolved in a given amount of a specified liquid. Most substances are more soluble at higher temperatures, so a mixture of two or more substances can be dissolved at an elevated temperature and then allowed to cool slowly. Alternatively, the liquid, called the solvent, may be allowed to evaporate. In either case, the least soluble of the dissolved substances, the one that is least likely to remain in solution, usually forms crystals first, and these crystals can be removed from the remaining solution by filtration. Figure 1.9 "The Crystallization of Sodium Acetate from a Concentrated Solution of Sodium Acetate in Water" dramatically illustrates the process of crystallization. Most mixtures can be separated into pure substances, which may be either elements or compounds. An element, such as gray, metallic sodium, is a substance that cannot be broken down into simpler ones by chemical changes; a compound, such as white, crystalline sodium chloride, contains two or more elements and has chemical and physical properties that are usually different from those of the elements of which it is composed. With only a few exceptions, a particular compound has the same elemental composition (the same elements in the same proportions) regardless of its source or history. The chemical composition of a substance is altered in a process called achemical change. The conversion of two or more elements, such as sodium and chlorine, to a chemical compound, sodium chloride, is an example of a chemical change, often called a chemical reaction. Currently, about 115 elements are known, but millions of chemical compounds have been prepared from these 115 elements. The known elements are listed in the periodic table (see Chapter 32 "Appendix H: Periodic Table of Elements"). In general, a reverse chemical process breaks down compounds into their elements. For example, water (a compound) can be decomposed into hydrogen and... Q: Crystallization separates mixtures based on differences in what, which usually increases with temperature? Choices: - density - viscosity - humidity - solubility A:
(Answer)
solubility
Ques: Answer the following question given this paragraph: One of the simplest machines is the lever, which is a rigid bar pivoted at a fixed place called the fulcrum. Torques are involved in levers, since there is rotation about a pivot point. Distances from the physical pivot of the lever are crucial, and we can obtain a useful expression for the MA in terms of these distances. Q: One of the simplest machines is the lever, which is a rigid bar pivoted at a fixed place called what? Choices: - caliper - sling - wheel - fulcrum A:
Ans: fulcrum
(Q).
Answer the following question given this paragraph: Inorganic chemistry is the study of chemicals that do not, in general, contain carbon. Inorganic chemicals are commonly found in rocks and minerals. One current important area of inorganic chemistry deals with the design and properties of materials involved in energy and information technology. Q: Inorganic chemistry refers to the study of materials *not* containing which element? Choices: - hydrogen - helium - oxygen - carbon A:
(A).
carbon
Ques:Answer the following question given this paragraph: The rock in Figure above is an example of a heterogeneous mixture. A heterogeneous mixture varies in its composition. The black nuggets, for example, are not distributed evenly throughout the rock. Q: What is the term for a mixture that varies in its composition? Choices: - homogeneous - amorphous - mixed composition - heterogeneous A:

Ans:heterogeneous
Answer the following question given this paragraph: The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute. A given quantity of solute dissolves faster when it is ground into small particles than if it is in the form of a large chunk because more surface area is exposed. The packet of granulated sugar exposes far more surface area to the solvent and dissolves more quickly than the sugar cube. Q: The size of the solute particles determines the rate of what? Choices: - merging - extracting - solution - dissolving A:
dissolving