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Chap 1 / Unit 1

The Scientific Method (Leaving Cert Exam Questions)

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
Created by: Aimee214
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