1 - Designing Experiments: Variables, Controls, Reliability, Validity
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Practice Questions
Test your understanding with targeted questions
Define a research question.
💡 Hint: What question drives your experiment?
What is the independent variable in the light intensity experiment?
💡 Hint: What are you changing in the experiment?
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of a research question in an experiment?
💡 Hint: What question helps you determine your experiment's aim?
True or False: The dependent variable is what we manipulate in an experiment.
💡 Hint: Remember which variable you change.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Design a comprehensive experiment to investigate the effects of different soil types on plant growth. Identify the independent, dependent, and controlled variables.
💡 Hint: Consider how you will keep all but one factor the same.
Critique an experiment where a student tests the effect of temperature on enzyme activity but doesn't control the pH. What implications does this have on the validity of the results?
💡 Hint: Think about how different factors interact in biological systems.
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