The cup without a lid is an example of an OPEN SYSTEM, where things can move in and out of the system. What was moving out of the cup with no lid?
Question 2
2.
Develop a model to answer the question:
What is happening to the liquid water that can explain why the mass of the cup system with no lid decreases over time?
Draw a zoomed-in view of the surface of hot water in a cup with no lid.
Question 3
3.
Use your model to make a prediction: If we left this system out in the room overnight, do you think the system would have the same amount of water in it tomorrow as it does right now? How about a week later? Why?
Question 4
4.
Question 5
5.
Question 6
6.
Explain how you chose your answer above.
An OPEN SYSTEM lets things go in and out. What would you call a system where nothing gets in our out? (like the cup with lid almost is).
dead system
empty system
closed system
shut system
Which of the following best describes what happens?
The mass of the water in the bag will be less than the mass of the ice cubes before they melted
The mass of the water in the bag will be the same as the mass of ice cubes before they melted
The mass of the water in the bag will be more than the mass of ice cubes before they melted
