DELETE Lesson 6: Explaining the Effect of Different Lid Designs
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Last updated 3 months ago
7 questions
Note from the author:
A beverage company wants to stop using plastic straws, so the company designs a new lid. The new lid has a much bigger hole than the old lid.
Alex, a scientist at the company, is wondering how this might affect what happens with the liquid inside the cup.
A beverage company wants to stop using plastic straws, so the company designs a new lid. The new lid has a much bigger hole than the old lid.
Alex, a scientist at the company, is wondering how this might affect what happens with the liquid inside the cup.
Required
2 points
2
Question 1
1.
1) First, Alex does an experiment in which she fills 2 cups with cold liquid at the same temperature: 1 cup with the old lid and 1 cup with the new lid. She finds that the liquid in one cup warmed up more than the liquid in the other cup after 10 minutes.
Which cup do you think warmed up more? Why?
Required
1 point
1
Question 2
2.
Now, Alex wants to do a second experiment to see how the amount of liquid changes in the same 2 cups (1 with the old lid, 1 with the new lid) over time.
She decides to leave them out for a month. She designs the following procedure:
1)Fill each plastic cup with liquid and put the lid on the cup.
2) Draw a line where the liquid level is on each cup.
3) At the end of 30 days, weigh the 2 cups to see if there is a difference in mass between them.
If Alex wants to use the mass of the liquid as her dependent variable, what other steps should she take to get the data she would need?
Required
1 point
1
Question 3
3.
Now, Alex wants to do a second experiment to see how the amount of liquid changes in the same 2 cups (1 with the old lid, 1 with the new lid) over time.
She decides to leave them out for a month. She designs the following procedure:
1)Fill each plastic cup with liquid and put the lid on the cup.
2) Draw a line where the liquid level is on each cup.
3) At the end of 30 days, weigh the 2 cups to see if there is a difference in mass between them.
If Alex wants to use the liquid level as her dependent variable, what other steps should she take to get the data she would need?
Required
1 point
1
Question 4
4.
Now, Alex wants to do a second experiment to see how the amount of liquid changes in the same 2 cups (1 with the old lid, 1 with the new lid) over time.
She decides to leave them out for a month. She designs the following procedure:
1)Fill each plastic cup with liquid and put the lid on the cup.
2) Draw a line where the liquid level is on each cup.
3) At the end of 30 days, weigh the 2 cups to see if there is a difference in mass between them.
To compare the 2 cups, what should Alex keep constant in her investigation?
Required
1 point
1
Question 5
5.
At the end of 30 days Alex finds that one cup lost more liquid than the other. Add particle diagrams for the zoomed-in views at lid locations A and B to help explain how that could happen.
Required
1 point
1
Question 6
6.
How do your diagrams help explain how one cup could lose more liquid than the other?
Required
2 points
2
Question 7
7.
Alex repeats the Question 1 experiment 4 times. Each time, she records how much the liquid in the cup that warmed up the most changed temperature after 10 minutes. Here are her results:
Based on these data, what is the average temperature change for the liquid in the cup? ________℃