Unit 3: Changes in Lithosphere

Which agent of erosion leads to the formation of sand dunes? 

• Wind
• Water
• Ice
• Gravity

How can water be an agent for physical weathering? 

• by absorbing gases from the atmosphere and ground to chemically react with minerals 
• by seeping into the soil and dissolving the minerals in rocks 
• by absorbing sulfur oxides and creating acid precipitation
• by seeping into the cracks of rocks and freezing

Which is most likely a prevention strategy for flooding?

• building artificial levees
• reducing water consumption
• recycling bottled-water containers

Which of these is an example of erosion?

• Water sitting on a lake
• rain breaking down a rock
• light shining on a mountain
• wind blowing away sediment

Which is formed when a section of impermeable rock forces groundwater to move laterally and emerge onto the surface of Earth? 

• spring
• an aquifer
• geyser
• well

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

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

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

• The movement of water from a confined aquifer into 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
• lightning

What features are created when rivers enter the ocean?

• Alluvial Fans
• Deltas
• Tributaries
• Drainage Basin

What is alluvium

• any stream-deposited sediment
• bed load sediment
• dissolved sediment
• suspended sediment