All flashcards
Flashcard 1: Identify the zone in a lake where sunlight does not penetrate.
Answer: Aphotic zone. Below the euphotic zone where no photosynthesis occurs.
Flashcard 2: What is the main characteristic of a benthic zone?
Answer: Bottom of a body of water. Where decomposers break down organic matter.
Flashcard 3: What is the main environmental role of mangroves?
Answer: Coastal protection. Buffer coastlines from storms and erosion.
Flashcard 4: What is a defining feature of the pelagic zone?
Answer: Open water area. Away from shore in the water column.
Flashcard 5: Identify the largest biome on Earth by volume.
Answer: Ocean biome. Covers about 71% of Earth's surface.
Flashcard 6: Identify the zone in the ocean where most marine life is found.
Answer: Euphotic zone. Upper sunlit layer where photosynthesis can occur.
Flashcard 7: Identify the primary producers in aquatic ecosystems.
Answer: Phytoplankton. Microscopic organisms that form base of aquatic food webs.
Flashcard 8: What is the main environmental role of mangroves?
Answer: Coastal protection. Buffer coastlines from storms and erosion.
Flashcard 9: Which biome is characterized by high salinity levels?
Answer: Marine biome. Ocean water contains about 3.5% dissolved salts.
Flashcard 10: What is the main source of light in aquatic biomes?
Answer: Sunlight. Penetration decreases with depth, limiting photosynthesis.
Flashcard 11: In which aquatic biome are mangroves typically found?
Answer: Coastal wetlands. Salt-tolerant trees adapted to tidal environments.
Flashcard 12: What is the primary source of energy in deep ocean ecosystems?
Answer: Chemosynthesis. Using chemicals instead of sunlight for energy production.
Flashcard 13: What is the main characteristic of a benthic zone?
Answer: Bottom of a body of water. Where decomposers break down organic matter.
Flashcard 14: What is a major human impact on freshwater biomes?
Answer: Pollution. Runoff introduces chemicals and excess nutrients.
Flashcard 15: What is a primary characteristic of the intertidal zone?
Answer: Exposure to air at low tide. Organisms must adapt to alternating wet and dry conditions.
Flashcard 16: State the major role of wetlands in an ecosystem.
Answer: Water filtration and flood control. Act as natural sponges and buffer zones.
Flashcard 17: Identify the primary limiting nutrient in freshwater lakes.
Answer: Phosphorus. Often limits algal growth in freshwater systems.
Flashcard 18: Which adaptation is common in fish living in the aphotic zone?
Answer: Bioluminescence. Self-produced light for communication and hunting in darkness.
Flashcard 19: Define the littoral zone of a freshwater biome.
Answer: Near shore area where sunlight penetrates. Shallow area supporting most aquatic plant life.
Flashcard 20: Identify the term for seasonal movement of lake water.
Answer: Turnover. Seasonal mixing brings nutrients from bottom to surface.
Flashcard 21: Identify the main type of vegetation in a marsh.
Answer: Grasses and sedges. Herbaceous plants adapted to waterlogged soils.
Flashcard 22: Which factor primarily influences oceanic currents?
Answer: Wind patterns. Drive global circulation patterns in oceans.
Flashcard 23: What is a common adaptation of organisms in estuarine environments?
Answer: Tolerance to varying salinity. Allows survival in fluctuating salt concentrations.
Flashcard 24: Identify the term for areas of rapid water movement in streams.
Answer: Rapids. Fast-flowing sections with turbulent water movement.
Flashcard 25: What is the main chemical component affecting ocean acidity?
Answer: Carbon dioxide. Absorption causes ocean acidification and pH changes.
Flashcard 26: Which aquatic biome is primarily influenced by freshwater flow?
Answer: Rivers and streams. Lotic systems with continuous water movement.
Flashcard 27: What is the primary driver of tides in coastal regions?
Answer: Moon's gravitational pull. Creates predictable rise and fall of sea levels.
Flashcard 28: Identify the process by which water is lost from aquatic systems.
Answer: Evaporation. Returns water to atmosphere in the water cycle.
Flashcard 29: Which type of water body is characterized by standing water?
Answer: Lakes and ponds. Lentic systems with minimal water movement.
Flashcard 30: Identify the main contribution of wetlands to biodiversity.
Answer: Provide habitat for diverse species. Transition zones support specialized species communities.