4b) visual observations as the sample is brought near the side of the flame, in the flame, and out of the flame, 4c) odor as the fibres burn, 4d) characteristics of the ash including the colour and texture. 4e) The man-made fibers will decompose and melt. much quicker than either the animal or vegetable fibers.
Bluefin tuna swim in a holding pen in Australia. A conservation group has named three fish species that it says are at risk of extinction. The fish are threatened because of overfishing to meet the worldâs growing demand for food.
1An aquatic shelled mollusc (e.g. an oyster or cockle) or crustacean (e.g. a crab or shrimp), especially one that is edible. âthis species is harmful to marine shellfishâ. âEven the rope leading down was covered in barnacles and the wreck itself was festooned in soft corals and shellfish.â. âSo are corals and shellfish, which make calcium carbonates that end up in the bottoms of oceans.â.