Question

Could some one that's quite good at science help me with a few questions?? I'm so tired that I'm practically dying XD and i have to finish this before i sleep O.O help?? XD

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.
the bird exhibit at the zoo

B.
a tropical fish aquarium

C.
the African Safari Park

D.
the tropical rainforest exhibit at the botanical gardens

Answer 1

I think its B??

Answer 2

Which diagram is the best representation of gas molecules in a closed container?



A.
Diagram A

B.
Diagram B

C.
Diagram C

D.
Diagram D

http://static.k12.com/calms_media/media/939000_939500/939154/2/4f733deb3f3ba2d0ae71c03dc848257a8ae5f0fd/MS2_PHY_05_02_105_gas_molecules.jpg

Answer 3

I think this one is also B..