Geologists reference a material's density in reference to it's weight. Density is the material's weight divided by the weight of an equal volume of water.
An adjective
No, it's an adverb. The adjective is heavy.
The opposite of heavy is light.
Heavy.
Heavy.
"Heavy" is an adjective that describes weight.
heavy
Yes. "Heavy" is an adjective, meaning it can describe a noun. Many times, an adjective is used before a noun, such as "beautiful blouse," beautiful being the adjective and blouse the noun. In this case, heavy could be used as an adjective in the sentence: "This heavy bowling ball will cause back pains to the players."
heavy.. heavy is already a adjective
Heavier.heaviest
Heavier is the comparative adjective for heavy. The superlative is heaviest.
Not usually. Heavy is an adjective. It modifies a noun. e.g . "a heavy cat." Heavily is an adverb. It modifies a verb. "He sighed heavily." There are, however, rare uses of 'heavy' as an adverb, most commonly where the verbs 'weigh' and 'lie' and 'hang' are used.