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yatzeni
scientific investigations
| Question | Answer |
|---|---|
| what is a hypothesis? | a possible answer to a scientific question. |
| How do we see if the Hypothesis is correct? | by testing the hypothesis with an experiment. |
| controlled experiment | An experiment in which only one variable is changed at a time |
| 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 |
| 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 |
| what is a conclusion? | when you make an educated guess on how the experiment went |
| Variables | All factors that can change in an experiment |
| The variable that is purposely changed to test a hypothesis is.. | manipulated variable |
| a manipulated variable can also be called a | independent variable |
| how many ways can you collect data? | 4 |
| collecting data can be done by | observing measuring asking questions performing an experiment |
| Tables and Graphs are toold that scientists use to? | organize and present information |
| tables allow? | a lot of information to be presented in a small space |
| what are graphs used for? | graphs are used to present information visually |
| circle graphs | are best used to show how a whole is divided into parts |
| most of the time circle graphs are in? | percentage |
| explain a bar graphs | are best used for counting and to show how a number of objects or events compare in relationship to a single property. |
| the longer the bar the | greater the amount of the object or frequency of the event. |
| give a good examples of questions that may use bar graphs include | the favorite colo of a students in a class or number of each type of animal in an area |
| Describe line graphs | best used to show a relationship between two measured quantities,usually as a trend over time. |
| good examples of questions that may use line graphs include | Plotting plant growth vs. days plotting temperatures vs. time or days plotting the year vs. number of animals present in an area |
| Interpreting Data | when an experiment is done, scientist analyze the data. |
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