What process converts solid water directly to gaseous water?

condensation
evaporation
transpiration
sublimation

Headward erosion results in a

lengthening of a river upslope
deepening of a river downslope
deepening of a river
lengthening of a river in the same direction as its flow

When river water reaches the ocean, its particles begin to settle out. Which particles settle out first?

clay
sand and gravel
silt
mud

High winds pushing against the ocean's surface are responsible for

riverine floods
storm surge
flash floods
liquefaction

Which of the following is a common beneficial effect of a flood?

cuts down on the number of insect pests
adds fertile silt soil to agricultural land
slows down the spread of disease
adds clean water to the drinking water supply

How does solution activity make limestone rocks permeable for groundwater flow?

cuts down on the number of open pores
makes the pore spaces less connected
fills in many of the limestone's cracks
gives the limestone numerous pits and holes

Natural discharge of a groundwater system occurs when

rainwater percolates down through the soil
the water table intersects the surface of the ground
surface water seeps into the ground
a confined aquifer is pumped for drinking water