Chapter 1 Test

22 terms by BiologyWeymouthHS

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explanation for a question or a problem that can be scientifically tested


using the senses to gather information




logical interpretation based on prior knowledge and observations


well tested explanation that unifies a broad range of observations

scientific method

a logical, systematic approach to the solution of a scientific problem


standard for comparison in an experiment

independent variable

factor in an experiment that researchers manipulate so that they can determine its effect

dependent variable

factor that changes as a result of a change in the independent variable

light microscope

microscope that uses a beam of light passing through one or more lenses to magnify an object

electron microscope

uses electrons to produce a magnified image of objects too small to be seen with a light microscope


all of the chemical reactions that build or break down materials within an organism


change over time; process by which modern organisms descended from ancient organisms


two organisms that are so similar they can interbreed in nature and produce fertile offspring


all the organisms in a particular location, including their non-living environment


members of a species in a defined area


part of Earth that living organisms inhabit


populations of different organisms living in a defined area


double stranded nucleic acid that stores and transmits genetic information


the process by which organisms keep their internal environment relatively stable


a proposed answer to a scientific problem; an educated guess


basic unit of life

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