Answer the following question given this paragraph: Motor vehicles account for almost half of fossil fuel use. Most vehicles run on gasoline, which comes from petroleum. Q: Motor vehicles account for almost half of the consumption of what? Choices: - hydrocarbon - greenhouse gases - electricity - fossil fuel A:
fossil fuel
(Question)
Answer the following question given this paragraph: A theory is constantly tested. If some data does not agree with the theory, the theory can be revised. If the theory cannot match the data, it is thrown out. That being said, sometimes a theory is well-established; it has a lot of evidence to back it up. A well-established theory is unlikely to be overthrown. It may just need to be modified a bit. But science does not prove anything beyond a shadow of a doubt. Q: In science, what is constantly tested, sometimes revised, sometimes thrown out and sometimes well-established? Choices: - a technique - a study - a variable - a theory A:
(Answer)
a theory
Ques: Answer the following question given this paragraph: The Process of Science Biology is a science, but what exactly is science? What does the study of biology share with other scientific disciplines? Science (from the Latin scientia, meaning "knowledge") can be defined as knowledge that covers general truths or the operation of general laws, especially when acquired and tested by the scientific method. It becomes clear from this definition that the application of the scientific method plays a major role in science. The scientific method is a method of research with defined steps that include experiments and careful observation. The steps of the scientific method will be examined in detail later, but one of the most important aspects of this method is the testing of hypotheses by means of repeatable experiments. A hypothesis is a suggested explanation for an event, which can be tested. Although using the scientific method is inherent to science, it is inadequate in determining what science is. This is because it is relatively easy to apply the scientific method to disciplines such as physics and chemistry, but when it. Q: What important aspect of the scientific method is a suggested explanation for an event, which can be tested? Choices: - scientific control - string theory - independent variable - hypothesis A:
Ans: hypothesis
(Q).
Answer the following question given this paragraph: to within the alveoli. As a result, carbon dioxide dissociates readily from hemoglobin and diffuses across the respiratory membrane into the air. In addition to the partial pressure of carbon dioxide, the oxygen saturation of hemoglobin and the partial pressure of oxygen in the blood also influence the affinity of hemoglobin for carbon dioxide. The Haldane effect is a phenomenon that arises from the relationship between the partial pressure of oxygen and the affinity of hemoglobin for carbon dioxide. Hemoglobin that is saturated with oxygen does not readily bind carbon dioxide. However, when oxygen is not bound to heme and the partial pressure of oxygen is low, hemoglobin readily binds to carbon dioxide. Q: When oxygen is not bound to heme and the partial pressure of oxygen is low, hemoglobin readily binds to what? Choices: - iron - carbon - sulfur - carbon dioxide A:
(A).
carbon dioxide
Ques:Answer the following question given this paragraph: isolating the individual components, preservationists are better able to determine the condition of an object and those books and documents most in need of immediate protection. The simplest class of organic compounds is the hydrocarbons, which consist entirely of carbon and hydrogen. Petroleum and natural gas are complex, naturally occurring mixtures of many different hydrocarbons that furnish raw materials for the chemical industry. The four major classes of hydrocarbons are the alkanes, which contain only carbonhydrogen and carboncarbon single bonds; the alkenes, which contain at least one carboncarbon double bond; the alkynes, which contain at least one carboncarbon triple bond; and the aromatic hydrocarbons, which usually contain rings of six carbon atoms that can be drawn with alternating single and double bonds. Alkanes are also called saturated hydrocarbons, whereas hydrocarbons that contain multiple bonds (alkenes, alkynes, and aromatics) are unsaturated. Q: The simplest class of organic compounds is the what? Choices: - particles - Phenols - gas - hydrocarbons A:

Ans:hydrocarbons
Ques: Answer the following question given this paragraph: One way to test a cause and effect hypothesis is to perform a controlled experiment. In a controlled experiment, two identical experiments are carried out side-by-side. In one of the experiments, the independent variable being tested is used, and in the other experiment, the control, the independent variable is not used. Q: What type of experiment involves two identical experiments carried out side-by-side, with and without an independent variable? Choices: - trial run - defined experiment - blind test - controlled experiment A:
Ans:
controlled experiment