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.
Glacier lanternfish. Some of the many varieties of this fish can have a length of 15 cm. (Photo: Stein Kaartvedt) You might be under the illusion that the most abundant fish in the ocean are the ones that are most popularly fished, such as cod, herring and anchovies. Not so. The greatest species and varieties of ocean fish currently swim in peace â at least in peace from the planetâs supreme predators, us.