Cracks in rocks widen as water in them freezes and thaws.  How does this affect the surface of the Earth?

• It reduces soil formation
• It changes the composition of the rocks
• It exposes rocks to increased rates of erosion and weathering
• It limits the exposure of rocks to acid precipitatoin

How can urbanization affect a local area

• It can increase the number of invasive species in an area
• It can decrease the risk of water pollution in an area
• It can increase the risk of flooding in an area
• It can decrease the need for natural resources in an area

Which is a farming technique that could improve the soil and the environment?

• Using fueled machines that will turn the soil continuously
• creating undisturbed layers of mulch in the soil
• Placing inorganic chemical fertilizers in the soil
• irrigating the soil with salty water

Subsurface ocean currents continually circulate from the warm waters near the equator to the colder waters in other parts of the world. What is the main cause of these currents?

• differences in topography along the ocean floor.
• differences in the density of ocean water
• the rotation of the Earth on its axis
• the movement of the jet stream

What is the most responsible for the presence of groundwater in an area?

• the movement of water from a confined aquifer into the surface water
• The movement of surface water and precipitation through soil and rock
• the movement of water from streams and rivers to watersheds
• the movement of surface water through impermeable rock

Which is the most common contamination source for freshwater resources?

• runoff
• digging wells
• melting of glaciers
• lightning

A community decides to upgrade its water purification and management systems.  What lasting effect could this have on available freshwater

• It could cause a decrease in water demand
• It could cause a decrease in water levels
• It could cause an increase in waterborne diseases
• It could cause an increase in the freshwater supply

Which storm most likely develops as air masses interact with the warm water in the Northwest Pacific ocean?

• Typhoon
• Tornado
• Blizzard
• Monsoon

Which is associated with an increase in Chlorofluorocarbons (CFCs) in the environment?

• An increase in health risks associated with UV radiation
• An increase in levels of methane gas in the atmosphere
• An increase in ozone levels in the upper atmosphere
• An increase in acid precipitation

Which natural phenomenon occurs as a result of the Earth rotating on its axis?

• movement of tectonic plates
• deep ocean currents
• seasonal changes
• day and night