float in vs float on
The verb "float" can take two different prepositions (i.e. "on" and "in") as in the following sentences:
"Why do icebergs float in the sea?"
"Why do icebergs float on the sea?"

Are there any difference between the two? But then in some cases such as "I couldn't swim so I was just floating in[on] the water/pool," the version with "in" sounds better to my ear, but I don't know why and I'm confused.

Can you help me? Thanks.

Question

float in vs float on
The verb "float" can take two different prepositions (i.e. "on" and "in") as in the following sentences:
"Why do icebergs float in the sea?"
"Why do icebergs float on the sea?"

Are there any difference between the two? But then in some cases such as "I couldn't swim so I was just floating in[on] the water/pool," the version with "in" sounds better to my ear, but I don't know why and I'm confused.

Can you help me? Thanks.

Answer

If you see the sea as a region, then you use "in".

If you see the sea as an object, then you use "on".

Intuitively, I agree with you. "In" is better (also because most of the iceberg is submerged).

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