EXAM Real 25 T4
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What are the key parts of a scientific investigation?
Writing an aim and hypothesis, identifying variables, writing a method, graphing results, and evaluating methods.
What are the three types of variables?
Independent (changed), dependent (measured), and controlled (kept the same).
What is a fair test?
An experiment where only one variable is changed and all others are controlled
Validity
Tests what it’s supposed to test.
Accuracy
Close to the true value.
Reliability
Gives consistent results
🔹 Scientific Investigations
Q: What is the purpose of an aim?
A: To state clearly what the experiment is trying to find out.
Q: What is a hypothesis?
A: A testable prediction that links the independent and dependent variables.
Q: What is the independent variable?
A: The variable you change on purpose.
Q: What is the dependent variable?
A: The variable you measure or observe.
Q: What are controlled variables?
A: The factors kept the same to ensure a fair test.