The study of life
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biology
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Begins with specific observations(facts), draws general conclusion, used to form scientific hypothesis |
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inductive reasoning |
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Starts with general idea, makes specific predictions that follow logically |
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deductive reasoning |
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The concerted human effort to understand, or to understand better, the history of the natural world and how the natural world works, with observable physical evidence as the basis of that understanding. |
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science |
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A statement that provides some explanation for the observed facts |
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hypothesis |
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The variable that is measured, counted, or observed |
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dependent variable |
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The variable that is manipulated |
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independent variable |
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Independent variable is held at a constant level or omitted |
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control |
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Method or sequence of steps performed for the experiment |
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procedure |
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Repeating the experiment several times to provide consistent results |
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replication |
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Observation that is subjective(colors, smells, etc...) |
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qualitative |
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Observation that includes facts or measurements |
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quantitative |
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The capacity to do work |
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energy |
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The set of chemical reactions that occur in living organisms to maintain life. |
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metabolism |
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Molecules and structures that detect stimuli |
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receptors |
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A specific form of energy that a receptor can detect |
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stimulus |
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To maintain relatively constant internal conditions |
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homeostasis |
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Reproduction which requires the two cells from different individuals to unite to produce the first cell of a new organism. |
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sexual reproduction |
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Reproduction in which a single organism can reproduce without the aid of another. |
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asexual reproduction |
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Fundamental form of matter that cannot be broken down into a different form of matter by ordinary chemical means |
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element |
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Smallest unit of an element that retains the element's properties, consist of three subatomic particles |
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atom |
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Atom that varies in neutron number |
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isotope |
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Union between the electron structures of two or more atoms |
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chemical bond |
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Occurs when two or more elements intermingle in proportions that can vary |
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mixture |
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3 kinds of chemical bonds |
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ionic, covalent, hydrogen |
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8 characteristics of living things |
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Assimilate and use energy, Can respond to their environment, Maintain relatively constant internal conditions, Possess an inherited information base in DNA, Can reproduce, Are composed of 1 or more cells, Evolved from other living things, Are highly organized on different levels |
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Bond in which atoms of opposite charge attract each other |
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ionic bond |
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An atom that has either lost or gained one or more electrons |
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ion |
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Bond in which atoms share outer-shell electrons with other atoms |
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covalent bond |
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Bond in which a weak attraction forms when the positive end of 1 polarized molecule is attracted to the negative end of another |
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hydrogen bond |
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Type of covalent bonding in which distribution of charge is symmetrical |
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nonpolar |
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Type of covalent bonding in which distribution of charge is asymmetrical |
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polar |
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