What is an estuary?
Estuary Biome

Flashcard
•
Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An estuary is a coastal area where freshwater from rivers meets and mixes with saltwater from the ocean.
2.
FLASHCARD QUESTION
Front
What causes the water level in an estuary to rise and fall?
Back
Ocean tides bring water in and out of the shore, causing flooding in the estuary.
3.
FLASHCARD QUESTION
Front
What is brackish water?
Back
Brackish water is a mixture of fresh and saltwater, typically found in estuaries.
4.
FLASHCARD QUESTION
Front
Why do plants like cattails and mangroves thrive in brackish water?
Back
They have adaptations for living in both freshwater and saltwater and need the waters to flood their roots each day.
5.
FLASHCARD QUESTION
Front
What is the defining difference between marine, freshwater, and estuary biomes?
Back
The defining difference is salinity (dissolved salt).
6.
FLASHCARD QUESTION
Front
Why can some birds and trees only live beside the river at the top of the estuary?
Back
Those birds and trees have adaptations for only freshwater and cannot tolerate flooding.
7.
FLASHCARD QUESTION
Front
What role do estuaries play in the ecosystem?
Back
Estuaries serve as nurseries for many marine species, providing a safe habitat for young fish and other organisms.
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