WorksheetsFreshwater Biome Quiz
Total questions: 10
Worksheet time: 8mins
How much of Earth's freshwater is surface water available for living things?
15%
5%
2.5%
1.2%
What percentage of Earth's total water is freshwater?
15%
5%
2.5%
1.2%
An area of land that channels water to a particular location is called a:
ecosystem
watershed
estuary
flood plain
Choose two sources of nitrogen runoff.
fertilizers
plastic waste
sewage
burning fossil fuels
acid rain
Which freshwater biome contains most of Earth's surface freshwater?
rivers and streams
lakes and ponds
wetlands
Eutrophication is...
nutrient pollution
excessive growth of algae
nutrient runoff
blocking of sunlight caused by algal blooms
The following are steps to illustrate the sequence of events that leads to the eutrophication of a waterway. Select the best option for the FIRST step.
Sunlight is blocked then algae die off
Dead zones occur due to lack of oxygen
Surface water runoff carries excess nutrients
Algae decays and bacteria uses up available oxygen
Massive algal blooms occur
The following are steps to illustrate the sequence of events that leads to the eutrophication of a waterway. Select the best option for the LAST step.
Sunlight is blocked then algae die off
Dead zones occur due to lack of oxygen
Surface water runoff carries excess nutrients
Algae decays and bacteria uses up available oxygen
Massive algal blooms occur
What are the 2 main contributors to excessive nutrients? (choose 2 answers)
Nitrogen
Phosphorus
Oxygen
Algae Blooms
Carbon
Swamps, marshes, and bogs are included in which freshwater biome?
Rivers/Streams
Lakes/Ponds
Wetlands
