Estuary Knowledge Quiz

What is the defining feature of an estuary?

• A freshwater lake surrounded by forests

• A body of water with only saltwater

• A coastal area where freshwater and saltwater mix

• A deep ocean trench with high pressure

Which of the following best describes the salinity in an estuary?

• Always salty like the ocean

• Always fresh like a river

• Completely dry

• A mix of freshwater and saltwater (brackish)

Which organism is commonly found in estuarine environments?

• Polar bear

• Mangrove tree

• Cactus

• Penguin

What is one major function of estuaries for marine animals?

• A place for hunting large prey

• A breeding and nursery ground for many species

• A migration route to deserts

• A high-pressure zone for deep sea creatures

Why are estuaries often referred to as “nurseries of the sea”?

• They produce seaweed used in medicine

• Many young fish and marine animals grow up there

• They are home to the oldest fish species

• They are visited frequently by sea birds

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Which of the following is a benefit estuaries provide to humans?

• Space for mountain climbing

• Location for skydiving

• Flood control and water filtration

• Increased desertification

What type of habitat is most commonly found in estuaries?

• Coral reef

• Mangrove forest

• Alpine tundra

• Deep sea vent

How do estuaries help reduce flooding in nearby areas?

• By absorbing storm surges and runoff

• By creating rain clouds

• By attracting floodwaters to deserts

• By evaporating all freshwater

What is one of the biggest human-related threats to estuaries?

• Earthquakes

• Volcanic eruptions

• Pollution from agriculture and industry

• Meteor showers

Tags

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Which statement about estuarine ecosystems is FALSE?

• Estuaries are among the most productive ecosystems on Earth

• Estuaries are always isolated from human activity

• Estuaries support diverse plant and animal life

• Estuaries help protect coastlines from erosion