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Chap 1 / Unit 1
The Scientific Method (Leaving Cert Exam Questions)
| Question | Answer |
|---|---|
| Why do scientists need to publish their research? | To spread any knowledge they may have found so that other scientists can work on it |
| How can they avoid scientists avoid bias? | By using a large sample / Double Blind Test / Random selection |
| What is the purpose of replicating an experiment? | To verify the result or to avoid bias |
| Hypothesis | An educated guess based on an observation |
| What are the limitations of the scientific methods? | Extent of our basic knowledge or Basis of investigation: lack of technology/materials/equipment or Application to a changing natural world: information obtained from organisms in the past may not be valid today |
| Why is a hypothesis important? | To form the basis of a prediction or to give a starting point for an experiment |
| Why must they contain the same genetic trait? (eg tadpoles) | So they are genetically similar or they are likely to respond in the same way |
| Why is control important? | To provide a comparison for the experiment |
| Suggest why they were separated by 25 in each group? | A larger sample makes allowance for illness (or death) or to make the results more statistically significant |
| Suggest how a test of the rate of iodine on growth of tadpoles may be carried out? | Different concentrations of iodine made up using pond water and leave for a period of time E.g 3 months |
| Suggest any factors that need to stay constant? | Temperature or volume of water or duration of exposure |
| Importance of a double-blind test? | Avoidance of bias as neither the experimenter nor the test group knows who gets what |
| How does a hypothesis differ from a thesis? | Hypothesis has not been proven while a theory has been proof |
| Data | Consists of the measurements/observations or information gathered from experiments |
| Replicates | Repeats (or copies) of an experiment |
| Experiment | Is designed to test a hypothesis |
| Theory | Is a hypothesis supported by many different experiments |
| Where may they publish their findings? | In a Scientific Journal |
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Aimee214