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Scientific method
| Question | Answer |
|---|---|
| What is a Law? | it is a principal that is believed to be true |
| Limitations to scientific method? | basic knowledge/faulty equipment/bias/miscalculation |
| How do you avoid bias? | use large sample sizes/ransom samples/repeat experiment 3 times and get an average |
| Definition of experiment | a series of steps taken to test a hypothesis or idea |
| Definition of control | a sample that is lacking the variable that is being investigate |
| What is the function of a control? | to compare the results |
| Definition of sample size | to ensure a fair test test, there must be an adequate sized sample to test |
| Why is random selection important? | random selection is important in an experiment to prevent bias |
| Why is it important for scientist to publish their results? | Peer review/adding to existing knowledge that is already out there |
| What is double-blind testing? | When both the patient and the investigator are unaware of which is the control and which is the experimental sample. |
| When is double-blind testing used? | It is used in clinical trials where a placebo is used |
| What is a placebo? | It is a tablet that does not contain the substance you are trying to investigate |
| What do you do to check an experiment has been successful? | Replicate ->do the experiment 3 times, then get an average |
| Definition of data | the information gathered during an experiment/investigation |
| What are the 2 types of data analysis? | Quantitative and Qualitative |
| Explain Quantitative: | is analyzing information using numbers |
| Explain Qualitative: | is analyzing information using you senses i.e. what you observe e.g. colour change |
| What are ethics? | refers to whether issues are morally right or wrong |
| How can you present your results? | Graph/table/bar chart |
| Definition of scientific method: | A series of steps taken to investigate a hypothesis |
| 1st step in scientific method: | make observations - look, listen' record |
| 2nd step in scientific method: | formulate a hypothesis (educated guess) - a possible explanation |
| 3rd step in scientific method: | Design and carry out controlled experiments |
| 4th step in scientific method: | collect and interpret data (results) |
| 5th step in scientific method: | make a conclusion |
| 6th step in scientific method: | compare the conclusion with existing knowledge |
| 7th step in scientific method: | write up and publish results in scientific journal |
| 8th step in scientific method: | develop a theory and formulate a principal |
| Definition of a principal | a theory that has proven to be valid |
| Definition of a theory | a hypothesis that is supported by experimentation |
| Definition of hypothesis | an educated guess |
Created by:
amykavanaghh
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