An Sci 200 Exam 1 Questions and Answers with Complete Solutions

An Sci 200 Exam 1 Questions and Answers with Complete Solutions types of crabs -stone -spiral -blue -horseshoe -fiddler most popular type of crab fiddler semi-terrestrial (crabs) will drown if submerged all time, carries its air down with its body crab mating males wave large red claws hermit crabs diet omnivorous (wood fiber) hermit crabs miscellaneous - shallow water dish - breathe with gills on land - need to provide shells setting up aquarium: liberal water surface gas exchange occurs at surface, needs to be specific area or volume setting up aquarium: enough light probably more important for our viewing, important if you have life plants setting up aquarium: right temperature tropical: 72-78F optimal for most goldfish: below 60F(cold water holds more oxygen than warm water) setting up aquarium: correct feeding feed what fish will eat in about 5 mins, juvenile fish eat more (feed too much=lots of waste) FLAWS feed, light, air, water, space/sanitation location -away from direct sunlight: algae -sturdy stand or table -not by heat source 3 types of filtration mechanical, chemical, biological mechanical filtration -gravel (1-2 lbs/gal) : under gravel filter -wood, floos, etc chemical filtration activated charcoal biological filtration bacteria: key to all filtration systems decorations (for fresh water) okay: glass, plastic, stainless steel, driftwood bad: coral, limestone, marble, metals what kind of water? -tap water best -water needs vary by species plants -live plants (with adequate light): add oxygen and remove some wastes -rotting plants (without adequate light): consume oxygen and add more wasteshow many fish? -one inch per gallon -3 square inches for small fish, 4-8 square inches for larger fish add cover to aquarium -avoid evaporation -avoid jumping out -avoid things getting in relatively little energy required for fish -streamlined movement -decreased need to overcome gravity -little lost heat to environment: heterothermic water quality -new tank shouldn't have nitrog