How to design a good lab Criterion B
How to design a good lab
Criterion B: Inquiring and designing 7 -8 level The student is able to: i. explain a problem or question to be tested by a scientific investigation ii. formulate and explain a testable hypothesis using correct scientific reasoning iii. explain how to manipulate the variables, and explain how sufficient, relevant data will be collected iv. design a logical, complete and safe method in which he or she selects appropriate materials and equipment.
Variables • Independent variable (X): It is the variable that you are going to change • Dependent variable (Y): It is the variable that you are going to measure • Controlled variables (CV): the ones should remain constant during the experiment • Aim (Research question): -How does X affect Y given that CV is constant? -What is the relationship between X and Y for constant CV?
How to manipulate the variables • Independent variable: How to change IV • Dependent variable: How to measure DV • Controlled variables: How to keep them constant Controlled variables Reason to control Method to control
Hypothesis • If independent variable changes, then the dependent variable will…. This is because…(scientific knowledge and reasoning)
Method to collect data What range does your independent variable cover? How many data do you need to collect within this range? How many times do you repeat the measurement for each set of data? Which actual values of independent variable are used? ie sufficient breadth of data ie sufficient quantity of data, at least 7 sets of data and at least 5 repetitions ie relevant data
Materials list • 5✖� 100 ml beaker Safety Risk Precaution
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