The shiny nature of silk can be related to

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

Salt in oceans comes from and of rocks

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium