Test: Aquatic Ecosystems Web Reading

What percentage of the earth's surface is covered in water?

• 90%

• 70%

• 50%

• 30%

What percentage of surface water on earth is freshwater?

• 1%

• 10%

• 3%

• 5%

What percentage of freshwater is underground?

• 10%

• 40%

• 20%

• 30%

What is an aquatic ecosystem?

• An ecosystem that exists on land

• An ecosystem that exists in the air

• An ecosystem that exists underground

• An ecosystem that depends on water being present

What is a limnologist?

• A scientist who studies terrestrial ecosystems

• A scientist who studies underground ecosystems

• A scientist who studies aquatic ecosystems

• A scientist who studies earth and land/water ecosystems

What are the two main groups of aquatic ecosystems?

• Freshwater and saltwater

• Marine and terrestrial

• Lentic and lotic

• Phytoplankton and zooplankton

What is a marine ecosystem?

• An ecosystem that exists on land

• An ecosystem that exists in the oceans

• An ecosystem that depends on water being present

• An ecosystem that exists in the air

What are the two main types of a freshwater ecosystems?

• Nekton and benthos

• Phytoplankton and zooplankton

• Lentic and lotic

• Littoral and limnetic

Which zone of a freshwater ecosystem is closest to the shore and abundant with plant life?

• Pelagic zone

• Abyssal zone

• Littoral zone

• Benthic zone

What is the primary difference between a pond and a lake?

• Ponds are deeper than lakes

• Lakes are generally larger and deeper than ponds

• Lakes have saltwater, while ponds have freshwater

• Ponds are man-made, while lakes are natural