8. A pot of water on a stove is heated to boiling. Relative to its surroundings, is the system of
the pot of water on the stove open or closed
to the exchange of energy and matter?
A. The system is closed to energy but open to
matter, and it gains energy when the
molecules collide.
B. The system is closed to energy and matter,
and energy is lost in the form of thermal
energy to the air and pot.
C. The system is open to energy and matter,
and it loses thermal energy when it moves
from the system to its surroundings.
D. The system is open to energy but closed to
matter, and energy is destroyed when it
leaves the system and moves into its
surroundings.

the answer is d. 4

hope this

also the more points you give the faster your questions get answered

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.