Data Collection Strategies in Experimental Design

What is the primary purpose of an experiment in the scientific process?

• To understand unknown phenomena or question existing results

• To collect random data

• To create new scientific laws

• To prove a hypothesis

Why is it important to decide what data needs to be collected in an experiment?

• To avoid any kind of measurement

• To impress other scientists

• To make the hypothesis testable and answer the research question

• To ensure the experiment is fun

In the sodium and water experiment, how long did it take for the sodium to fully react with room temperature water?

• Exactly one minute

• Over three minutes

• Two minutes

• Under 40 seconds

What was the reaction time of sodium with boiling water?

• Two minutes

• Exactly one minute

• Under 40 seconds

• Over three minutes

What broad question was asked in the baking soda and vinegar experiment?

• What is the chemical formula of vinegar?

• What differences in results will be observed with varying temperatures of vinegar?

• How to make vinegar at home?

• What is the pH level of baking soda?

Why is it challenging to measure the reaction time of baking soda and vinegar?

• The reaction fizzes for a long time even after it is mostly over

• The reaction is too slow

• The reaction is too fast

• The reaction does not produce any visible changes

What was the time taken for room temperature baking soda and vinegar to reach the 250 milliliter mark?

• Two seconds

• Twenty seconds

• Ten seconds

• Four seconds

How long did it take for the chilled baking soda and vinegar to reach the 250 milliliter mark?

• Twenty seconds

• Two seconds

• Four seconds

• Ten seconds

What was the time taken for the room temperature baking soda and vinegar to fall to the 125 milliliter level?

• 22 seconds

• 35 seconds

• 20 seconds

• 31 seconds

How long did it take for the chilled baking soda and vinegar to fall to the 125 milliliter level?

• 35 seconds

• 22 seconds

• 31 seconds

• 20 seconds