Home
Search
Create
Library
Topics
Student
Teacher
Admin
Map
Sign in for more features
YourStory
Home
Search
Create
Library
Topics
Student
Teacher
Sign in
Feedback
Contact Us!
Assessment
What is the primary source of freshwater on Earth?
Glaciers and ice caps
Atmospheric precipitation
Lakes and rivers
Underground aquifers
Which of the following factors is most critical in defining a freshwater ecosystem?
Salinity levels
Water temperature
Nutrient availability
Water flow and chemistry
What human activity is most often responsible for freshwater pollution?
Industrial discharge
Agricultural runoff
Urban development
Recreational activities
Submit