その物質は水に浮かぶほど軽い。

Meaning
the substance is light enough to float on water

Vocab used in this sentence

その
the, that, its, those
物質
substance, material, matter, chemicals, compounds, mass
a, the, is, am, are, will
water, liquid, wed, watery
in, to, on, at, into, upon
浮かぶ
float, floating, rise to the surface, come to mind, hovering
ほど
so, about, as much as, approximately, degree, extent
軽い
light, mild, easy, simple, minor, casual, careless

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