Aquatic Ecosystems

Which is NOT a type of aquatic ecosystem?

• ocean
• estuary
• monastery
• wetland

Temperature, sunlight and oxygen are examples of ____ factors.

• abiotic
• biotic

Freshwater has ____ amount of salt in it.

• more than 1 ppm
• less than 1 ppm
• 10 ppm
• more than 30 ppm

What are areas where freshwater meets saltwater called?

• wetlands
• estuaries
• coastal byways
• intertidal zones

Which is NOT a freshwater ecosystem?

• stream
• lake
• ocean
• river

What are coral reefs?

• rock
• deposits of bones of dead fish
• plants
• outside skeletons of tiny, soft-bodied animals

Which of the following is NOT a freshwater ecosystem?

• lake
• pond
• estuary
• stream

On the coral reef ecosystem, which factor is abiotic?

• algae
• rocks
• sea horses
• sponges

Which statement is true about ponds but NOT lakes?

• plants surround the shore
• surface water contains organisms that use sunlight for photosynthesis
• sunlight reaches the bottom of the body of water
• people fill them in with sediment to create land for houses and buildings

How do people use water from freshwater ecosystems?

• drinking
• bathing
• crop irrigation
• all of the above