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esci 21-40


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21. Sources of groundwater contamination include:
a. pesticides and fertilizers
b. oil
c. salt water
d. landfills/waste
e. all of the above

all of the above
22. When sediment is floating in a stream creating “murky” water, the sediment is moving (transported) as part of its _____________ load.
a. dissolved
b. suspended
c. bed
d. sorting
e. flooding

23. This drainage pattern occurs when streams diverge from a central elevated area.
a. rectangular
b. radial
c. dendritic
d. trellis

24. To achieve flood control, ___ involves altering a stream channel in order to speed the flow of water.
a. entrenchment/ b. rectifying
c. channelization
d. rejuvenation
e. replenishment

25. The single most important erosional agent is/are ____________
a. running water
b. glaciers
c. wind
d. waves
e. plants and animals

running water
26. The continuous movement of water from the oceans to the atmosphere, from the atmosphere to the land, and from the land back to the sea is known as ____________
c. the Hydrologic cycle

the Hydrologic cycle
27. The deposition of sediment based on the size of the particle is called _____
a. erosion/b. transportation
c. bed load/d. weathering
e. sorting

28. Seismologists are currently looking at animal behavior as a gauge to seismic activity. a.True
b. False

29. Ultimate base level is sea level.
a. True
b. False

30. Karst topography is mainly the result of acid precipitation meeting and dissolving the limestone bedrock.
a. True
b. False

31. As its name implies, the water table is always very level (flat).
a. True
b. False

32. Which erosional features r exhibited by an older stream?
a. deltas, oxbow lakes, natural levees
b. nat levees, back swamps, pt bars
c. cutbanks, u-shaped river beds, wide flood plains
d. all of the above

all of the above
33. The steeper the slope of a mountain, the higher the chance for mass wasting to occur.
a. True
b. False

34. The water table separates the zone of aeration and the zone of saturation.
a. True
b. False

35. Tsunamis are tidal waves that are often caused by the gravitational forces of the Earth, Moon, and Sun.
a. True
b. False

36. Chemical weathering would be most effective
a. in a warm, dry climate
b. in a cold, dry climate
c. in a warm, humid climate
d. equally in any kind of climate

in a warm, humid climate
37. Which is not tru about mechanical weathering?
a. prod smaller pieces
b. adds 2 the effectiveness of chem weathering
c. may lead 2 da formation of talus slopes
d. does not change the rock’s mineral composition
e. does not affect metamo
does not affect metamorphic rocks
38. The center or inner core of the Earth is composed mainly of iron (Fe) and Nickel (Ni).
a. True
b. False

39. The incorporation and transportation of material by water, wind, or ice describes the process of ___
a. weathering/b. erosion
c. mass wasting/d. sheeting
e. none of these

40. Oceanic crust tends to be less dense than continental crust
a. True
b. False


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