Question

Students are investigating the differences in open and closed systems. They heated 2 containers of water. They recorded their results in the tables shown.

Two tables.Short description, Two tables.,Long description,
Container 1
Before After
Mass of Container and Contents in grams 200 150
Volume of Water in milliliters 100 50

Container 2
Before After
Mass of Container and Contents in grams 200 200
Volume of Water in milliliters 100 50


Question
What can the students conclude from the results of their investigation?

Answer options with 4 options
A.
Container 1 is a closed system because a gas was produced. Gases do not have mass.

B.
Container 1 is an open system because a gas was produced. Gases make things lighter.

C.
Container 2 is an open system because the volume changed even though the mass did not change.

D.
Container 2 is a closed system because the mass did not change even though the volume changed.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The correct answer is C. Container 2 is an open system because the volume changed even though the mass did not change. This indicates that something was able to escape from the container, making it an open system.