Q: Science is the process of knowing about the natural universe through observation and this? Read this paragraph and choose the correct option from the provided answers: Chemistry is a branch of science. Although science itself is difficult to define exactly, the following definition can serve as starting point. Science is the process of knowing about the natural universe through observation and experiment. Science is not the only process of knowing (e. , the ancient Greeks simply sat and thought), but it has evolved over more than 350 years into the best process that humanity has devised to date to learn about the universe around us. The process of science is usually stated as the scientific method, which is rather naively described as follows: (1) state a hypothesis, (2) test the hypothesis, and (3) refine the hypothesis. Actually, however, the process is not that simple. (For example, I don't go into my lab every day and exclaim, "I am going to state a hypothesis today and spend the day testing it!") The process is not that simple because science and scientists have a body of knowledge that has already been identified as coming from the highest level of understanding, and most scientists build from that body of knowledge. An educated guess about how the natural universe works is called a hypothesis. A scientist who is familiar with how part of the natural universe workssay, a chemistis interested in furthering that knowledge. That person makes a reasonable guessa hypothesisthat is designed to see if the universe works in a new way as well. Here's an example of a hypothesis: "if I mix one part of hydrogen with one part of oxygen, I can make a substance that contains both elements. " Most good hypotheses are grounded in previously understood knowledge and represent a testable extension of that knowledge. The scientist then devises ways to test if that guess is or is not correct. That is, the scientist plans experiments. Experiments are tests of the natural Saylor URL: http://www. saylor. org/books. Choices: - Test - variation - experimental - experiment A:
experiment

Q: All of the monatomic ions have oxidation numbers equal to their? Read this paragraph and choose the correct option from the provided answers: There are 6 elements in this reaction. All of the monatomic ions have oxidation numbers equal to their charges. Additionally, we can assign an oxidation state of -2 to each oxygen atom and +1 to each hydrogen atom. Now, we just need to assign the oxidation states of manganese in MnO 4 - , nitrogen in the nitrite and nitrate ions, and sulfur in the sulfate ion. These can be determined by choosing a value for which all of the oxidation states in the ion add up to its overall charge. For example, in the nitrite ion:. Choices: - atomic number - shape - atomic weight - charges A:
charges

Q: Q: Which rule is a result of trends in energies and is useful in explaining why atoms form the ions that they do? Read this paragraph and choose the correct option from the provided answers: valence shell is called the octet rule. When atoms form compounds, the octet rule is not always satisfied for all atoms at all times, but it is a very good rule of thumb for understanding the kinds of bonding arrangements that atoms can make. It is not impossible to violate the octet rule. Consider sodium: in its elemental form, it has one valence electron and is stable. It is rather reactive, however, and does not require a lot of energy to remove that electron to make the Na+ ion. We could remove another electron by adding even more energy to the ion, to make the Na2+ ion. However, that requires much more energy than is normally available in chemical reactions, so sodium stops at a 1+ charge after losing a single electron. It turns out that the Na+ ion has a complete octet in its new valence shell, the n = 2 shell, which satisfies the octet rule. The octet rule is a result of trends in energies and is useful in explaining why atoms form the ions that they do. Now consider an Na atom in the presence of a Cl atom. The two atoms have these Lewis electron dot diagrams and electron configurations:. Choices: - electrons rule - nutron rule - coupling rule - octet rule A:
A: octet rule

Question: Q: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. when that happens, the organism that benefits, and is not harmed, is called a what? Read this paragraph and choose the correct option from the provided answers: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. When that happens, the organism that benefits, and is not harmed, is called a parasite . This type of relationship is known as parasitism. Choices: - child - viruses - infection - parasite A:
Answer: parasite

*Question*
Q: What are the basic units of structure and function in living organisms? Read this paragraph and choose the correct option from the provided answers: All living things consist of one or more cells. Cells are the basic units of structure and function of living organisms. Choices: - proteins - molecules - lipids - cells A:
**Answer**
cells

Q: Q: What type of particles can a beta particle be? Read this paragraph and choose the correct option from the provided answers: Choices: - diode or positron - cytoplasm or positron - anode or positron - electron or positron A:
A: electron or positron