A ________ slide is type of mass wasting process where the surface of rupture is a concave-upward curve and descending material exhibits downward and outward motion
A) translational
B) fall
C) rotational
D) horizontal
Answer: C
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What is a reduction?
A. the reaction of oxygen with a reductant B. the gain of electrons C. the loss of an electron from the valence shell D. the formation of red compounds in the presence of an oxidant E. the reduction of the number of electrons
At which of the following times is thermal turbulence above the surface usually most severe?
A. immediately after sunset B. at the time of maximum surface heating C. around midnight D. just before sunrise
Which statement about average stream velocity is true?
A)Velocity is higher in the upper reaches where gradients are steeper. B)Velocity is constant along the river's course. C)Velocity decreases downstream because the gradient is less steep. D)Velocity increases in the downstream direction. E)Velocity decreases downstream because of frictional forces.
A farmer is tired of watching crops die in the field from several pest species. She decides that next year she is going to use every type of ecological pest control she can find to address the problem
Over the winter she gets ready, ordering pheromones that interfere with the reproduction of the pests, sterile male flies that will try to reproduce with some of the pest flies, and wasps that lay their eggs in the larvae of another pest. It is expensive, but she thinks this should work well. Which of the following forms of control is she not using? A) Natural enemies control B) Cultural control C) Genetic control D) Natural chemical control