Quiz about Freshwater Ecosystems

Question 1

Which is NOT a freshwater ecosystem?

Accepted Answer

an estuary

Answer

a river

Answer

a lake

Answer

a stream

Question 2

A wetland that contains a mixture of fresh water and salt water is called

Accepted Answer

an estuary

Answer

a stream

Answer

a river

Answer

a pond

Question 3

phytoplankton are

Accepted Answer

tiny autotrophic organisms in water

Answer

large plants

Answer

tiny heterotrophic organisms in water

Answer

large animals

Question 4

An ecosystem where water covers the soil or water is near the surface of the soil is called

Accepted Answer

a wetland

Answer

a desert

Answer

an ocean

Answer

an estuary

Question 5

Estuaries form where

Accepted Answer

a river meets the sea

Answer

a lake evaporates

Answer

a river becomes dammed

Answer

a wetland becomes filled in

Question 6

Estuary water should have

Accepted Answer

less salt than the ocean

Answer

more salt than the ocean

Answer

no salt

Question 7

What aquatic biome is characterized by flowing fresh water?

Accepted Answer

Rivers/Streams

Answer

Lakes/Ponds

Answer

Mangroves Swamps

Answer

Coral Reefs

Question 8

Which watery biome has the lowest concentration of salt?

Accepted Answer

freshwater

Answer

ocean

Answer

coral reef

Answer

wetland

Question 9

Which biome is pictured below?

Accepted Answer

freshwater

Answer

mangrove

Answer

coral reef

Answer

ocean

Question 10

What are organisms living on, near, or in the sediment of lakes called?

Accepted Answer

Benthic

Answer

Nektonic

Answer

Planktonic

Answer

Limnetic

Question 11

This lake zone suffers from a lack of light and has limited photosynthesis:

Accepted Answer

Profundal

Answer

Littoral

Answer

abyssal

Answer

Limnetic

Question 12

Eutrophic lakes are characterized by...

Accepted Answer

high nutrients, low oxygen

Answer

low nutrients, low oxygen

Answer

low nutrients, high oxygen

Answer

high nutrients, high oxygen

Question 13

Where would you find cattails and reeds?

Accepted Answer

Littoral zone

Answer

Limnetic zone

Answer

Profundal zone

Answer

Benthic zone

Question 14

Which zone contains the most life in a lake or pond?

Accepted Answer

Littoral zone around the shoreline

Answer

Profundal zone in the deep and dark

Answer

Benthic zone in the sediment

Answer

Limnetic zone in the open lake as far as light reaches

Question 15

Plankton are NOT....

Accepted Answer

top carnivores of pond food webs

Answer

tiny, microscopic organisms

Answer

easy prey for other aquatic life

Answer

producers

Question 16

An oligotrophic lake would:

Accepted Answer

Be cold and oxygen-rich

Answer

Contain summer stratification

Answer

Contain algal blooms

Answer

Be shallow with large biomass

Question 17

Algae might grow faster in the summer months due to?

Accepted Answer

Warmer water

Answer

Decrease in sediments

Answer

Increase in snails

Answer

Decrease in available dissolved nutrients

Question 18

Eutrophic lakes are:

Accepted Answer

Older lakes whose nutrient content is high and occupied by warm water fish

Answer

young lakes with little vegetation and few nutrients

Answer

lakes that contain a medium amount of nutrient build up

Question 19

Mesotrophic lakes are:

Accepted Answer

lakes that contain a medium amount of nutrient build up

Answer

Older lakes whose nutrient content is high and occupied by warm water fish

Answer

young lakes with little vegetation and few nutrients

Question 20

Oligotrophic lakes are:

Accepted Answer

young lakes with little vegetation and few nutrients

Answer

Older lakes whose nutrient content is high and occupied by warm water fish

Answer

lakes that contain a medium amount of nutrient build up

Question 21

Discharge entering a stream at a specific, detectable point such as a pipe or outfall.

Accepted Answer

Point source pollution

Answer

Non-point source pollution

Answer

Fog

Answer

Riparian

Question 22

Diffuse runoff from large areas of land.

Accepted Answer

Nonpoint source pollution

Answer

Point source pollution

Answer

Sediment

Answer

Watershed

Question 23

Rapid, dense growth of algae that robs the water of oxygen as it dies and decomposes.

Accepted Answer

Algal bloom

Answer

Sediment

Answer

Point source pollution

Answer

Non-point source pollution

Question 24

What is turbidity a measure of?

Accepted Answer

Cloudiness of water.

Answer

Photosynthesis in water.

Answer

Change in biological activity.

Answer

Solubility of atmospheric gases in water.

Question 25

Which of the following can directly increase water turbidity?

Accepted Answer

Increased soil erosion and algae growth.

Answer

Decreased temperature and sewage dumping

Answer

Algae growth and increased pH.

Answer

Fertilizer runoff and increased DO.

Question 26

What is the most immediate effect of nitrate of phosphate pollution?

Accepted Answer

Increased algae growth

Answer

Greater macroinvertebrate diversity

Answer

A decrease in decomposer activity.

Answer

Decreased turbidity.

Question 27

Cooler water temperatures are better because

Accepted Answer

Both are reasons why cool water is beneficial

Answer

Cold water holds more dissolved oxygen

Answer

Cold water makes it harder for bacteria to grow

Question 28

Macroinvertebrates such as stoneflies, mayflies and water boatmen require high levels of dissolved oxygen and their abundance is an indication of:

Accepted Answer

Good water quality

Answer

Poor water quality

Answer

Don't tell us anything about water quality

Answer

Invertibrates don't tell us anything about water quality

Question 29

All of the following are examples of marine ecosystems EXCEPT __________________.

Accepted Answer

Ponds

Answer

Tide pools

Answer

Coral Reefs

Answer

Oceans

Freshwater Ecosystems

29 questions

Which is NOT a freshwater ecosystem?

A wetland that contains a mixture of fresh water and salt water is called

phytoplankton are

An ecosystem where water covers the soil or water is near the surface of the soil is called

Estuaries form where

Estuary water should have

What aquatic biome is characterized by flowing fresh water?

Which watery biome has the lowest concentration of salt?

Which biome is pictured below?

What are organisms living on, near, or in the sediment of lakes called?

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