Freshwater resource and Water Pollution

Less Than ? of Earth’s waster is accessible for human use

less than 1%

All living organisms contain water, with humans being composed of about?

70% water

Earth’s water is potable?

Less than 3%

Salty and unsuitable for consumption on about ?

Remaining 97%

Properties of Water

Consist of H2O

Hydrogen Bonds

Occur when each end of a water molecule is attracted to the opposite charge of adjacent water molecules

Hydrological Cycle

Water circulates in the environment through the water cycle

Precipitation

liquid falls from the atmosphere

Evaporation

moves water vapor to the atmosphere

Surface Water

Refers to precipitation that stays on the land’s surface and doesn’t seep into the soil.

The area of land that drains into a single river or stream called?

Drainage basin or watershed

Groundwater

the supply of fresh water stored in underground aquifers

Water pollution

refers to physical and chemical changes in water that harmfully impact the health of humans and other organisms

Oligotrophic lakes

characterized by their clear, unenriched waters and low nutrient levels.

Eutrophic lakes

characterized by cloudy water caused by the proliferation of algae and cyanobacteria

Point sources

can be traced to a specific location

nonpoint source pollution

occurs over large areas, with no single entry point