What is an estuary

What is an estuary?

• a. A desert ecosystem

• b. A freshwater lake

• c. A coastal area where freshwater meets saltwater

• d. A mountainous region

What is a key feature of an estuary ecosystem?

• a. Lack of biodiversity

• b. High levels of pollution

• c. High levels of nutrients and biodiversity

• d. Absence of aquatic life

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Why are estuaries often called 'nurseries of the sea'?

• a. Because they are always calm and peaceful

• b. Because many marine animals breed and raise their young there

• c. Because they are full of seaweed

• d. Because they are shallow and easy to navigate

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

• a. Consistently high salinity

• b. Consistently low salinity

• c. Fluctuating salinity due to the mixing of freshwater and saltwater

• d. No salinity variations

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NGSS.MS-ESS2-4

What is the primary source of nutrients in an estuary?

• a. The ocean

• b. The river

• c. The sun

• d. The soil

Which of the following is a common type of plant found in estuaries?

• a. Cacti

• b. Mangroves

• c. Pine trees

• d. Ferns

Why are estuaries important for migratory birds?

• a. They provide a resting place

• b. They provide a source of food

• c. They provide a breeding ground

• d. All of the above

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NGSS.MS-LS2-5

What is the primary source of freshwater in estuaries?

• a. Rainfall

• b. Underground springs

• c. River inflow

• d. Ocean currents

Which term refers to the point where freshwater and saltwater meet in an estuary?

• a. Convergence zone

• b. Halocline

• c. Thermocline

• d. Brackish zone

What role do estuaries play in supporting marine life?

• a. They provide a harsh environment unsuitable for life.

• b. They serve as breeding grounds and nurseries for many species.

• c. They have no impact on marine ecosystems.

• d. They decrease biodiversity.

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