SCIENCE Due to the intense heat and pressure on the inner core, scientists believe it is a

1)solid

2)liquid

3)semi-fluid

4)gas

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

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.