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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. - PowerPoint PPT Presentation
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• 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. Information gathered from observing a plant that grows 3 cm over a two-week period results in
• a. inferences.
• b. variables.• c. hypotheses• d. data.
• d. data.
• 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. Scientific hypotheses must be proposed in a way that
• a. 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. A controlled experiment allows the scientist to isolate and test
• a. a conclusion. • b. a mass of
information• c. several variables.• d. a single variable.
• d. a single variable.
• 6. The ability to reproduce results is an important part of any
• a. hypothesis.• c. law.• b. theory.• d. experiment.
• d. experiment
• 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.
• 9. The amount of light and temperature are examples of
• a. 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.
10.The basic unit of mass in the International System of Units, or SI, is the
• a.meter. c.liter.• b.ounce. d.gram
• d.gram
• 11. The space surrounding the nucleus of an atom contains
• a.protons. c.neutrons.• b.electrons. d.ions.
• b.electrons.
• What type of electron is available to form bonds?
• a.valence c.ionic• b.nucleus d.covalent
• a.valence
• 13. What type of ion forms when an atom loses electrons?
• a.neutral c.negative b.positive d.possibly positive or negative
• b.positive
• 14. The most abundant compound in most living things is
• a.carbon dioxide. • c.sodium chloride.• b.water. • d.sugar.
• b.water.
• 15. A monosaccharide is a
• a.carbohydrate.• c.nucleic acid.• b.lipid• d.protein.
• a.carbohydrate.
• 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.
• 17. When hydrogen and oxygen combine to form water, water would be
• a.a product.• c.both a product and a
reactant.• b.a reactant.• d.neither a product nor a
reactant.
• a.a product.
• 18. If a reaction in one direction releases energy, the reaction in the opposite direction
• a.also releases energy• .c.destroys energy.• b.absorbs energy.• d.cannot occur.
• b.absorbs energy.
• 19. Enzymes affect the reactions in living cells by changing the
• a. products of the reaction.
• b. speed of the reaction • c. temperature of the
reaction.• d. pH of the reaction.
• b. speed of the reaction.
• The work of scientists begins with
• a. testing a hypothesis.
• c. creating experiments.
• b. careful observations.
• d. drawing conclusions.
• b. careful observations.
• 21. Hypotheses may arise from
• A. prior knowledge. B. logical inferences.
• C. imaginative guesses.
• D. all of the above
j. Your mom
• D. all of the above
• 22. A controlled experiment allows the scientist to isolate and test
• a. a conclusion. • b. a mass of
information.• c. several variables.
d. a single variable.
• d. a single variable.
• 23. Scientists publish the details of important experiments so that
• a. 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
• 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.
• 25. All of the following are characteristics of all living things EXCEPT
• a. growth.• b. reproduction.• c. movement.• d. use of energy.
• c. movement.
• 26. The process by which organisms keep their internal conditions fairly constant is called
• a. homeostasis.• b. evolution.• c. metabolism.• d. photosynthesis.
• a. homeostasis.
• 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
• 28. The three particles that make up an atom are
• a. protons, neutrons, and isotopes.
• b. neutrons, isotopes, and electrons.
• c. positives, negatives, and electrons.
• d. protons, neutrons, and electrons.
• d. protons, neutrons, and electrons.
• 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.
• 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
• 31. A covalent bond is formed as the result of
• a. transferring electrons.
• b. sharing electrons.• c. transferring
protons.• d. sharing protons.
• b. sharing electrons.
• 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
• 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
• 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
• 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
• 36. Chemical reactions that release energy
• a. will not occur.• b. will never explode.• c. will always explode.• d. often occur
spontaneously.
• d. often occur spontaneously.
• 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.
• 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
• 40. A variable that is deliberately changed in an experiment is the ______________ variable.
• 40. Manipulated or independent
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