Compared to traditional tillage, conservation tillage ____.
A. reduces topsoil erosion
B. accelerates water loss from the soil
C. causes soil compaction
D. does not require herbicides
E. reduces the amount of carbon stored in the ground
Answer: A
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Why might logging of a drainage basin change the slope of the river?
A) The base level of the stream is altered by the increased sediment load. B) The stream must steepen to accommodate the increased runoff. C) Increased sediment load causes the river to steepen its gradient to transport more sediment. D) Decreased erosion shuts off sediment supply, causing the river to erode.
The bending of seismic waves as they pass from one material to another is called seismic ________.
A. deflection B. reflection C. attenuation D. refraction E. Waves don't bend when they pass through different materials.
Which of the following biomes has the most annual rainfall?
a. the chaparral b. the tropical dry forest c. temperate deciduous forest d. temperate rainforest
What is the lowest level that sediment from a mountain can be transported to?
A. sea level B. the bottom of a stream channel C. the bottom of the sea D. Earth's core