List all of the ways that you used water yesterday How do we get this water? Write their answers on the board. Then ask, how do we get this water? Write those answers on the board. They should have: oceans, groundwater, lakes, ice, swamps, and rivers. Have them put these sources in order from the most water, to the least water

Earth’s Water Water covers ~71% of the Earth’s surface Only substance on Earth that occurs naturally as a solid, liquid, and gas A hydrosphere is the total amount of water on a planet.

In order from MOST to LEAST amount of water Ocean Ice Groundwater Lakes Swamps Rivers Water vapor Have 1 big beaker, then pour that it into several smaller beakers. Put salt in big beaker

97% of Earth’s water is saltwater 3% is freshwater 77% of freshwater is frozen Out of 23% of freshwater that isn’t frozen, only .5% is available to living organisms

Draw a version of this

Surface WATER WATER FLOWING DOWNSLOPE ALONG Earth’s surface is called runoff Runoff may reach a body of water, evaporate, or seep into the ground

Surface WATER The pores within the ground must be large enough for water to seep through If not, the water will collect or run downhill If the pores already contain water the newly fallen precipitation will either remain standing on top of the ground or run downhill

Only a small amount of runoff becomes groundwater When runoff seeps into the ground, it becomes groundwater. This process is called infiltration. Only a small amount of runoff becomes groundwater

Groundwater Unsaturated/Aeration Zone – rain water passes through this zone Saturated Zone – where the water collects (water completely fills pore spaces) These two zones meet at a boundary called the water table

Groundwater movement The ability of a material to let water pass through is called permeability Coarse grain – more space, more water Fine grain – less space, less water (can be “impermeable)

Can be confined or unconfined Groundwater movement A rock layer that stores groundwater and allows the flow of groundwater is called an aquifer Can be confined or unconfined

Groundwater moves SLOOOOOW Have students demonstrate the speed of water flow. River = sprint Lake = walk GW = slide http://techalive.mtu.edu/meec/module04/GroundwaterSpeed.htm

Draw, color and label this diagram Complete the GW online simulator Shade unsaturated zone brown and saturated zone blue. Draw a dark line at the water table Draw, color and label this diagram Complete the GW online simulator