hydro hydro and....

What is porosity?

• how quickly water can flow through
• how poor a city is
• how much pore space is in a substance

What is permeability?

• how much pour space is in a substance
• a bad hair day
• how much water can come through
• how quickly water can flow through a substance

Groundwater and surface water interact in all of these ways EXCEPT

• surface water infiltrates the ground and becomes groundwater
• rivers, streams, and lakes can be a  source of ground-water recharge 
• groundwater near/at Earth’s surface can be a source of rivers, streams, and lakes
• the ocean evaporates and starts the water cycle

Why might South Carolina sue North Carolina over water?

• .  North Carolina is selling water for too much money
• .  rivers from North Carolina are polluted and water is depleted when it reaches South Carolina
• North Carolina has not treated water before it reaches South Carolina as agreed
• there is no reason to sue

Floods can occur when

• the water table is too low
• groundwater has not been recharged
• soil made of sand is permeable
• the water table is high

Which of the following is true about the slope of a stream channel and the velocity of flow?

• the steepness of slope does not affect velocity
• the steeper the slope, the slower the velocity
• the steeper the slope, the faster the velocity
• the steepness of slope only affects lateral velocity

If the carrying capacity of a stream is reduced, the stream will

• a.  deposit sediment beginning with the largest particles in the sediment load 
• a.  stop eroding and continue to transport its existing sediment load
• begin downcutting
• a.  deposit sediment beginning with the smallest particles in the sediment load

Freshwater is considered a limited resource because

• a.  most large cities depend on surface water for their water supplies
• a.  only a very small percentage of Earth’s water consists of surface water
• a.  groundwater is often pumped out of the ground faster than is can be replaced
• all of these