§-Marine Science Q&A
QLD · QCAA← Marine Science
Marine Science Q&A by dot point
A short Q&A bank for every QLD Marine Science syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Unit 3: Marine systems - connections and change
Explain how structural, physiological and behavioural adaptations allow marine organisms to survive abiotic challenges such as salinity, pressure, temperature, light and wave action
Describe how marine organisms are classified using the taxonomic hierarchy, explain the major groups found in marine systems, and describe how biodiversity is measured and why it matters
Explain the connectivity between marine ecosystems (mangroves, seagrass meadows, coral reefs) through the movement of energy, nutrients, larvae and organisms, and describe the consequences of disrupting these connections
Describe the structure and feeding of the coral polyp, explain the mutualistic symbiosis between coral and zooxanthellae, and describe how corals grow and reproduce to build reefs
Describe the structure and zonation of coral reefs (fringing, barrier, platform, atoll, coral cay) and explain the abiotic factors that control where reef-building corals grow
Explain energy flow through marine food webs (producers, consumers, trophic levels, productivity) and the cycling of carbon and nitrogen in marine ecosystems
Describe the adaptations of mangroves to salty, waterlogged, low-oxygen mud, and explain their ecological roles as nurseries, sediment traps and coastal protectors
Describe the division of the ocean into pelagic and benthic realms and into depth zones, and explain how light, temperature, pressure and food availability change across them
Describe the key abiotic factors of marine environments (light, temperature, salinity, dissolved gases, pressure, nutrients) and explain how they vary with depth and latitude to structure oceanic zones
Distinguish phytoplankton from zooplankton, explain their role as the base of marine food webs, and describe the microbial loop and how plankton support fisheries and the carbon cycle
Define gross and net primary productivity, explain the abiotic factors that limit marine primary production, and describe how productivity is measured and where the most productive marine zones occur
Describe seagrasses as flowering marine plants, explain their adaptations and high productivity, and describe their roles as habitat, food source, sediment stabiliser and carbon store
Unit 4: Ocean issues and resource management
Describe aquaculture and its main methods, explain its benefits and environmental impacts, and evaluate its sustainability compared with wild-capture fisheries using Australian examples
Explain how rising carbon dioxide drives ocean warming, coral bleaching, ocean acidification and sea level rise, and describe the consequences for marine ecosystems such as the Great Barrier Reef
Explain the physiological mechanism of coral bleaching, describe the conditions that trigger mass bleaching, and evaluate the prospects for reef recovery using Great Barrier Reef events
Explain the concepts of maximum sustainable yield, overfishing and bycatch, and evaluate fisheries and marine management strategies (quotas, marine protected areas, zoning) using Australian examples
Describe the major human impacts on marine environments (pollution, runoff, plastics, dredging, crown-of-thorns outbreaks, coastal development) and explain the processes by which they degrade ecosystems such as the Great Barrier Reef
Describe the major types of marine pollution (plastics, oil, nutrients and sediment) and explain their sources, impacts and the mechanism of eutrophication, using Great Barrier Reef examples
Describe how marine protected areas and zoning manage human use, and evaluate the effectiveness of the Great Barrier Reef Marine Park zoning plan using evidence
Explain how surface and deep ocean circulation are driven by wind, density and the Coriolis effect, and describe the East Australian Current and the global thermohaline conveyor
Explain the causes of sea level rise (thermal expansion and ice melt), describe its impacts on coastlines and coastal ecosystems, and evaluate adaptation responses using Australian examples
Explain overfishing and bycatch, describe the methods used to manage fisheries sustainably (quotas, size and gear limits, seasons), and evaluate their effectiveness using Australian examples
Describe the ocean as a major carbon sink, explain the solubility and biological carbon pumps and the role of blue carbon, and explain how a warming ocean affects carbon uptake
Explain the causes of tides, waves and ocean currents, and describe how water movement transports sediment and nutrients and shapes coastlines through erosion and accretion