Ateacher asks her students to find the average mass of a chicken egg. each student is provided a carton of a dozen eggs and is asked to create his or her own procedure for finding the average mass. felicia chooses an egg that appears to be of average size. she places the egg on a balance and records its mass as the average. darren finds the individual mass of one of his eggs and records it. he repeats the procedure for each of the 12 eggs. he lists all of the masses in order from smallest to largest and then records the most commonly appearing mass as the average. colin finds the individual masses of all of his eggs. he also asks his classmates for the individual masses of their eggs. he adds the masses of all of the eggs in the classroom and divides by the total number of eggs measured. he records this mass as the average. ella places all 12 of her eggs on a balance at the same time. she divides the total mass by twelve and records it as the average. whose procedure is likely to produce the most accurate result?

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.

Yes, take risk in life