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stack1/Scientific

stack1/Scientific Investigations

QuestionAnswer
hypothesis is a possible explanation for a set of observations or a possible answer to a scientific question.
variables All factors that can change in an experiment
controlled experiment An experiment in which only one variable is changed at a time
Data Collection Gathering data requires observations to be made
Interpreting Data When an experiment is done, scientists analyze the data
Communicating Results After gathering and interpreting data, scientists draw conclusions about their hypotheses
balance a tool used to measure the mass of objects
Graduated cylinder a beaker marked in intervals that is used to measure volume
Microscope a tool used to produce magnified images of small objects
Spring scale a tool used to measure weight and force
Thermometer a tool used to measure temperature
Test tube a cylindrical tube, usually smaller than a beaker, that is open at one end and closed at the other
manipulated variable The variable that is purposely changed to test a hypothesis
constants All of the other variables or factors, besides the manipulated and responding variables, are known as controlled variables or constants
responding variable The factor that may change in response to the manipulated variable
Tables and graphs are tools that scientists use to organize and present information.
Tables allow a lot of information to be presented in a small space by organizing data efficiently
graphs used to present information visually
Circle graphs are best used to show how a whole is divided into parts (or percentages of a whole)
Bar graphs are best used for counting and to show how a number of objects or events compare in relationship to a single property.
Line graphs are best used to show a relationship between two measured quantities, usually as a trend over time.
Forming a Hypothesis The questions that biologists ask typically come from observations of the natural world
scientific investigations To answer these questions, biologists need to collect evidence
experiments Scientist design experiments to test hypotheses
Created by: veronicanunez
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