Estuaries Quiz

What is the meaning of the word 'estuary'?

• A bay

• A lake

• A mountain

• A desert

What type of water is found in estuaries?

• Brackish water

• Saltwater

• Freshwater

• Distilled water

Which river in the Philippines is considered a tidal estuary?

• Agusan River

• Pampanga River

• Cagayan River

• Pasig River

What is the primary threat to estuaries?

• Climate change

• Land development

• Overfishing

• Pollution

What is the importance of mangroves in estuaries?

• Increase pollution

• Harm wildlife

• Cause erosion

• Provide coastal protection

What is the main reason for the loss of mangroves?

• Climate change

• Natural disasters

• Overexploitation by coastal settlers

• Conservation efforts

What do estuaries provide a protected refuge for?

• Land animals

• Plants

• Marine species

• Birds only

What is the primary source of livelihood opportunities provided by estuaries?

• Manufacturing

• Tourism

• Mining

• Farming

What do estuaries act as filters for?

• Freshwater

• Pollution

• Air

• Saltwater

What is the main reason for animal extinction in estuaries?

• Overfishing

• Pesticide and hunting

• Climate change

• Natural disasters