Question

No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?
A. a wood-burning fireplace
B. a washing machine
C. a capped soda bottle
D. a pot of boiling water
I thinks its
c.

Answer 1

I agree: a capped soda bottle has very limited contact with the surroundings, as it has to be relatively closed so that the gas bubbles don't escape.

The remaining options have contact either with air (A and D) or with water from the outside (B)

Answer 2

Answer:

I honestly also think its C.