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Scientific method

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