1. Chapter 17

2. 1. True or False: Streams and lakes contain a large percentage of the global water supply.

3. 2. Which reservoir constitutes the largest fraction of the global FRESH water supply.
streams and rivers
glaciers
groundwater
lakes

4. 3. How much water does a human need to survive on a daily basis?
10 liters
7 liters
5 liters
2 liters

5. 4. How much water does the average American consume on a daily basis?
6000 liters
250 liters
50 liters
2 liters

6. 5. Which of these rocks have high porosity?
vuggy limestone
sandstone
unfractured shale
unfractured granite
both A and B
both C and D

7. 6. Which of these rocks have high permeability?
vuggy limestone
sandstone
unfractured shale
unfractured granite
both A and B
both C and D

8. 7. An artesian well is free flowing because the well surface is:
above the water table.
at the water table.
beneath the water table.

9. 8. Which of the following rocks would make the best aquifer?
granite with few fractures
highly fractured granite
unfractured shale
unfractured schist

10. 9. Which of the following sediments would make the best aquifer?
gravel
sand
silt
clay

11. 10. True or False: The water table is always horizontal, like your kitchen table.

12. 11. Which equation for the inputs and outputs of the water cycle in a given land area correctly groups the inputs and outputs?
Precipitation = runoff + infiltration + evaporation + transpiration
Precipitation + evaporation + transpiration = runoff + infiltration
Precipitation + runoff = evaporation + transpiration + infiltration
Precipitation + infiltration = runoff + evaporation + transpiration

13. land-surface subsidence. your well to go dry.
12. Excessive pumping of a well during a drought will lead to a deepening of the cone of depression. This in turn can cause:
land-surface subsidence.
your well to go dry.
your neighbor’s well to go dry.
All of the above.
None of the above.

14. 13. Which of the following is LEAST effective in combating the effects of a declining water table?
deepening the well by drilling
decreasing the pumping rate
installing a more powerful pump
modifying land use practices to decrease water need

15. 14. A cone of depression forms when:
rate of recharge > drawdown.
rate of recharge = drawdown.
rate of recharge < drawdown.

16. 15. True or False: The rate of groundwater flow is constant throughout a region.

17. 16. Which of these rock types is susceptible to karst formation?
granite
limestone
sandstone
schist

18. 17. The well on the far right corner of this image:
would be safe due to natural filtering capability of the aquifer.
would be threatened by contamination.

19. 18. Which type of water can be used to produce energy?
hydrothermal waters
channellized flow
tidal flow
All of the above.

20. 19. Geysers and hot springs are due to heating of water at depth by:
geothermal gradient.
magma source.
Both of the above.

21. 20. When contaminants enter the groundwater:
the contamination remains at the point source.
contaminants spread out away from the point source in a plume.
the contaminated water does not mix with the rest of the groundwater.