In this sentence, "rock" is a noun.
The word "terrestrial" can function as an adjective.
Geology is a noun.
Twenty grams would be considered the mass of the rock, which is a measure of the amount of matter it contains.
Yes, a volcanic eruption is part of the rock cycle. When a volcano erupts, magma from beneath the Earth's surface is expelled onto the surface as lava. Once the lava cools and solidifies, it forms igneous rock, which is a key component of the rock cycle.
Ocean is a noun
verb
Rock can be a verb or a noun. It can be the action of moving something back and forth. It can refer to a stone.
The word crag is a noun. A crag is a rugged rock.
The word sedimentary is an adjective. It is a geological term used to describe a form of rock.
The part of speech for this particular word is a noun.
part of speech
The word "crag" is a noun. It refers to a steep or rugged rock or cliff.
Aquifer is a noun. It refers to an underground layer of water-bearing rock or sediment that can supply water.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.