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Aquatics

Big bang theory, spheres interaction, aquatic

QuestionAnswer
Hubble’s Law & expansion The farther a galaxy is, the faster it is moving away, showing the universe is expanding in all directions.
Evidence for the Big Bang Redshift of galaxies → universe is expanding Cosmic Microwave Background → leftover heat from early universe Light element abundance → matches early universe predictions
Water vs land life Water life has buoyancy, limited light, and dissolved oxygen; land life has gravity support, more oxygen availability, and greater temperature variation.
Abiotic factors in aquatic environments Coral reef: warm water, sunlight, salinity Stagnant pond: low oxygen, high nutrients, temperature changes Deep ocean: cold, high pressure, no light
Sphere interactions in coral ecosystem Atmosphere provides gases, hydrosphere supplies water, biosphere includes organisms, and geosphere provides reef structure and minerals.
Nitrogen cycle summary Nitrogen is fixed into ammonia by bacteria (nitrogen fixation), then converted to nitrite and nitrate (nitrification). Plants absorb nitrates. Decomposition returns ammonia. Denitrification converts nitrates back to nitrogen gas.
Dissolved oxygen & temperature As water temperature increases dissolved oxygen decreases because warm water cannot hold as much oxygen as cold water
One factor affecting dissolved oxygen Salinity: higher salinity reduces dissolved oxygen levels.
CO₂ & marine ecosystems Increased CO₂ causes ocean acidification, reducing calcification and harming shells and coral.
Climate change impacts on aquatic ecosystems Warmer water reduces oxygen and stresses organisms Coral bleaching from increased sea temperatures
Created by: user-2038394
Popular Marine Sci Tech 1 sets

 

 



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