No system is completely closed off from its surroundings, but some systems are almost completely closed.

Which represents a system that is almost completely closed?

A.
a metal file cabinet

B.
a small island

C.
a glass bottle

D.
an insulated thermos

Question

No system is completely closed off from its surroundings, but some systems are almost completely closed. 
 
Which represents a system that is almost completely closed?
 
 A.
a metal file cabinet
 
 B.
a small island
 
 C.
a glass bottle
 
 D.
an insulated thermos

roadjester · Answer

Could you give me a bit more information? What are these questions for? What level physics class?

anonymous · Answer

physical science i have a test i dont get

roadjester · Answer

Meh.
D. Insulated thermos
Do you have a way of knowing if the answers are correct?

anonymous · Answer

well at the end of the test i can go to a review and i can tell you if i got them right

roadjester · Answer

okay then