Presentation on theme: “1. Which of the following is NOT a goal of science?”— Presentation transcript:
1 1. Which of the following is NOT a goal of science?a. to investigate and understand the natural world b. to explain events in the natural world c. to use data to support a particular point of view d. to use derived explanations to make useful predictions c. to use data to support a particular point of view
2 2. Information gathered from observing a plant that grows 3 cm over a two-week period results ina. inferences. b. variables. c. hypotheses d. data. d. data.
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3 3. Which of the following is NOT a way that scientists generate hypotheses?a. using informed, creative imagination b. using logical inference c. using prior knowledge d. using a feeling about what should occur d. using a feeling about what should occur
4 4. Scientific hypotheses must be proposed in a way thata. ensures that an experiment will be valid. b. enables them to be proved valid. c. enables them to be tested. d. doesn’t contradict previous hypotheses. c. enables them to be tested.
5 5. A controlled experiment allows the scientist to isolate and testa. a conclusion. b. a mass of information c. several variables. d. a single variable. d. a single variable.
6 6. The ability to reproduce results is an important part of anya. hypothesis. c. law. b. theory. d. experiment. d. experiment
7 7. A theory a. is always true. b. is the opening statement of an experiment. c. may be revised or replaced. d. is a problem to be solved. c. may be revised or replaced.
8 9. The amount of light and temperature are examples ofa. factors necessary for life. b. methods of energy production. c. factors to which living things respond. d. factors that affect reproduction. c. factors to which living things respond.
9 10.The basic unit of mass in the International System of Units, or SI, is thea.meter. c.liter. b.ounce. d.gram d.gram
10 11. The space surrounding the nucleus of an atom containsa.protons. c.neutrons. b.electrons. d.ions. b.electrons.
11 What type of electron is available to form bonds?a.valence c.ionic b.nucleus d.covalent a.valence
12 13. What type of ion forms when an atom loses electrons?a.neutral c.negative b.positive d.possibly positive or negative b.positive
13 14. The most abundant compound in most living things is b.water.a.carbon dioxide. c.sodium chloride. b.water. d.sugar. b.water.
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14 15. A monosaccharide is a a.carbohydrate. c.nucleic acid. b.lipid d.protein. a.carbohydrate.
15 16. Which statement is true?a.Simple sugars are made of polysaccharides b.Glycerol is made of fatty acids. c.RNA molecules are made of nucleotides. d.Amino acids are made of proteins. c.RNA molecules are made of nucleotides.
16 17. When hydrogen and oxygen combine to form water, water would bea.a product. c.both a product and a reactant. b.a reactant. d.neither a product nor a reactant. a.a product.
17 18. If a reaction in one direction releases energy, the reaction in the opposite directiona.also releases energy .c.destroys energy. b.absorbs energy. d.cannot occur. b.absorbs energy.
18 19. Enzymes affect the reactions in living cells by changing thea. products of the reaction. b. speed of the reaction c. temperature of the reaction. d. pH of the reaction. b. speed of the reaction.
19 The work of scientists begins witha. testing a hypothesis. c. creating experiments. b. careful observations. d. drawing conclusions. b. careful observations.
20 21. Hypotheses may arise fromA. prior knowledge. B. logical inferences. C. imaginative guesses. D. all of the above j. Your mom D. all of the above
21 22. A controlled experiment allows the scientist to isolate and testa. a conclusion. b. a mass of information. c. several variables. d. a single variable. d. a single variable.
22 23. Scientists publish the details of important experiments so thata. their work can be repeated. b. their experimental procedures can be reviewed. c. others can try to reproduce the results. d. all of the above d. all of the above
23 24. A well-tested explanation that unifies a broad range of observations is a (an)a. hypothesis. b. theory. c. inference. d. controlled experiment. b. theory.
24 25. All of the following are characteristics of all living things EXCEPTa. growth. b. reproduction. c. movement. d. use of energy. c. movement.
25 26. The process by which organisms keep their internal conditions fairly constant is calleda. homeostasis. b. evolution. c. metabolism. d. photosynthesis. a. homeostasis.
26 27. Which is NOT a unit of measurement in the International System of Units, or SI?a. meter b. ounce c. liter d. gram b. ounce
27 28. The three particles that make up an atom area. protons, neutrons, and isotopes. b. neutrons, isotopes, and electrons. c. positives, negatives, and electrons. d. protons, neutrons, and electrons. d. protons, neutrons, and electrons.
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28 29. The nucleus is made of a. protons and electrons. b. electrons and neutrons. c. protons and neutrons. d. protons, neutrons, and electrons. c. protons and neutrons.
29 30. Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions? a. compound b. isotope c. nucleus d. enzyme a. compound
30 31. A covalent bond is formed as the result ofa. transferring electrons. b. sharing electrons. c. transferring protons. d. sharing protons. b. sharing electrons.
31 32. Which of the following organic compounds is the main source of energy for living things?a. carbohydrates c. nucleic acids b. lipids d. proteins a. carbohydrates
32 33. Which of the following is NOT a function of proteins?a. store and transmit heredity b. help to fight disease c. control the rate of reactions and regulate cell processes d. used to form bones and muscles a. store and transmit heredity
33 34. What is the process that changes one set of chemicals into another set of chemicals?a. cohesion b. adhesion c. chemical reaction d. dissolving c. chemical reaction
34 35. What is the term used to describe the energy needed to get a reaction started?a. adhesion energy b. activation energy c. cohesion energy d. chemical energy b. activation energy
35 36. Chemical reactions that release energya. will not occur. b. will never explode. c. will always explode. d. often occur spontaneously. d. often occur spontaneously.
36 37. A substance that speeds up the rate of a chemical reaction is called a (an)a. catalyst. b. lipid. c. molecule. d. element. a. catalyst.
37 38. The information you gather during an experiment is called your _______________.38. Data.
38 39. Based on his ________________, Redi made a prediction that keeping flies away from meat would prevent maggots appearing on the meat. 39. Hypothesis Reference: p. 9
39 40. A variable that is deliberately changed in an experiment is the ______________ variable.40. Manipulated or independent
40 41. The information gathered from observation is called ______________.41. Data.
41 42. The smallest units that are considered to be alive are called _______________.42. Cells.
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