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Questions and Answers
Which of the following is not a type of variable in a scientific experiment?
Which of the following is not a type of variable in a scientific experiment?
- Independent
- Observation (correct)
- Control
- Dependent
In a scientific experiment, which variable is manipulated by the researcher?
In a scientific experiment, which variable is manipulated by the researcher?
- Dependent variable
- Observation variable
- Independent variable (correct)
- Control variable
Which type of variable is observed and measured during a scientific study?
Which type of variable is observed and measured during a scientific study?
- Control variable
- Independent variable
- Dependent variable (correct)
- Constant variable
What role does a control variable play in an experiment?
What role does a control variable play in an experiment?
Which of the following is true about the dependent variable?
Which of the following is true about the dependent variable?
Which variable remains unchanged throughout the experiment?
Which variable remains unchanged throughout the experiment?
What is the primary goal of this investigation?
What is the primary goal of this investigation?
Which of the following would NOT be considered a variable in this experiment?
Which of the following would NOT be considered a variable in this experiment?
What would be an appropriate hypothesis for this experiment?
What would be an appropriate hypothesis for this experiment?
Why is an inert material like sand used in this experiment?
Why is an inert material like sand used in this experiment?
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Study Notes
Experiment on Melting Points of Ice with Different Salts
- The experiment investigates the effect of various salts on the melting points of ice.
- Four equal-sized patches of ice are prepared for the experiment.
- Each patch receives a different treatment:
- One patch gets table salt (NaCl).
- Another patch receives Calcium Chloride (CaCl2).
- A third patch is treated with Potassium Carbonate (KCO3).
- The final patch is covered with inert sand as a control substance.
- An equal amount of each salt or sand is applied to the respective patches.
- The student measures the volume of ice that remains after applying the salts.
- The amount of ice melted is determined by subtracting the remaining volume from the original volume of ice.
- Control variable in the experiment is the size of the ice patches, ensuring uniformity in test conditions.
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