What are ferrous and non ferrous metals
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Ferrous metals are ones that contain iron ( can be alloys of iron), and non-ferrous metals don't contain iron.

Hope this helps, let me know if you have any questions! :)

Explanation:

ferrous metal is the metal which contains iron.

non ferrous metal is the metal which do not contains iron or iron component.

newton's first law of motion

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.