Q: What process determines which of two fossils is older or younger than the other? Read this paragraph and choose the correct option from the provided answers: Relative dating determines which of two fossils is older or younger than the other, but not their age in years. Relative dating is based on the positions of fossils in rock layers. Lower layers were laid down earlier, so they are assumed to contain older fossils. This is illustrated in Figure below . Choices: - differential dating - difference dating - curve dating - relative dating A:
relative dating

(Question)
Q: A heterogeneous mixture of particles of one substance distributed throughout a second substance in a different phase is known as what? Read this paragraph and choose the correct option from the provided answers: Summary A suspension is a heterogeneous mixture of particles of one substance distributed throughout a second phase; the dispersed particles separate from the dispersing phase on standing. In contrast, the particles in a colloid are smaller and do not separate on standing. A colloid can be classified as a sol, a dispersion of solid particles in a liquid or solid; a gel, a semisolid sol in which all of the liquid phase has been absorbed by the solid particles; an aerosol, a dispersion of solid or liquid particles in a gas; or an emulsion, a dispersion of one liquid phase in another. A colloid can be distinguished from a true solution by its ability to scatter a beam of light, known as the Tyndall effect. Hydrophilic colloids contain an outer shell of groups that interact favorably with water, whereas hydrophobic colloids have an outer surface with little affinity for water. Emulsions are prepared by dispersing a hydrophobic liquid in water. In the absence of a dispersed hydrophobic liquid phase, solutions of detergents in water form organized spherical aggregates calledmicelles. Phospholipids are a class of detergent-like molecules that have two Saylor URL: http://www. saylor. org/books. Choices: - disruption - solution - fluid - suspension A:
(Answer)
suspension

Ques: Q: A fact or question is only considered science if it has what property? Read this paragraph and choose the correct option from the provided answers: Note the word science in that last sentence. Earth Science is a science, or maybe it's made up of a lot of sciences. But what is science? Most people think of science as a bunch of knowledge. And it is. But science is also a way of knowing things. It's different from other ways of knowing because it is based on a method that relies on observations and data. Science can't say how many angels can dance on the end of a pin because that question can't be tested. In fact, science can't even say if there are such things as angels for the same reason. For something to be science, it must be testable. And scientists are the people who do those tests. Choices: - it is interesting - it is mineral - it is believable - it is testable A:
Ans: it is testable

(Q).
Q: What is the science of classifying living things is called? Read this paragraph and choose the correct option from the provided answers: Scientists classify living things to make sense of biodiversity and who how living things are related. The science of classifying living things is called taxonomy. Choices: - entomology - methodology - physiology - taxonomy A:
(A).
taxonomy

Ques:Q: Hagfishes have a skull made of what? Read this paragraph and choose the correct option from the provided answers: Choices: - gelatin - chitin - bone - cartilage A:

Ans:cartilage

Ques:Q: What is the conversion of metals from their ores to more useful forms called? Read this paragraph and choose the correct option from the provided answers: Summary The conversion of metals from their ores to more useful forms is calledmetallurgy, which consists of three general steps: mining, separation and concentration, and reduction. Settling and flotation are separation methods based on differences in density, whereas pyrometallurgy is based on a chemical reduction at elevated temperatures, and hydrometallurgy uses chemical or electrochemical reduction of an aqueous solution. In pyrometallurgy, a reductant must be used that does not form stable compounds with the metal of interest. In hydrometallurgy, metals are separated via the formation of metal complexes. Choices: - thermodynamics - nanotechnology - crystallography - metallurgy A:

Ans:
metallurgy