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Scientific Invest.
Scientific Investigations
| Question | Answer |
|---|---|
| where do the questions come from | come from observations of the natural world. |
| what does this mean | This means that scientists must be able to carry out investigations and gather evidence that will either support or disprove the hypothesis |
| what is a hypothesis? | A hypothesis is a possible explanation for a set of observations or a possible answer to a scientific question. |
| how must a hypothesis be formed? | A hypothesis must be phrased in the form of a statement |
| what must it be | testable |
| what do scientist design to test hypothesis? | experiments |
| what are all factors that change called? | variables |
| Test tube | a cylindrical tube, usually smaller than a beaker, that is open at one end and closed at the other |
| thermometer | a tool used to measure temperature |
| Spring scale | a tool used to measure weight and force |
| what is Microscope | a tool used to produce magnified images of small objects |
| what is Graduated cylinder | a beaker marked in intervals that is used to measure volume |
| what is balance | a tool used to measure the mass of objects |
| what do observations involve? | senses of sight, hearing, touch, and smell. |
| what does gathering data require? | observation |
| only one variable is changes? | controlled experiment |
| 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. |
| give a good examples of questions that may use bar graphs include | the favorite color of a students in a class or number of each type of animal in an area |
| the longer the bar the | greater the amount of the object or frequency of the event. |
| 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. |
| most of the time circle graphs are in? | percentage |
| circle graphs | are divided into parts |
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