Aquatic Ecosystems

Which is NOT a type of aquatic ecosystem?

• ocean
• estuary
• monastery
• wetland

Temperature, sunlight and oxygen are examples of ____ factors.

• abiotic
• biotic

Which statement about the deep ocean is true?

• Plankton dominate this zone of the ocean

• Some organisms in this zone use chemicals for energy rather than sunlight

• Coral reefs are commonly found in this zone

• Organisms in this zone must be able to survive major changes in salinity

What are areas where freshwater meets saltwater called?

• wetlands
• estuaries
• coastal byways
• intertidal zones

Which is NOT a freshwater ecosystem?

• stream
• lake
• ocean
• river

Which example represents an abiotic factor in an aquatic ecosystem?

• Water lilies float on top of a pond

• A population of bass is living in a lake

• Dragonflies feed on small insects near a pond

• The pH of a lake is decreased by acid rain

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