Mass wasting can be an important source of sediment carried in a stream
Indicate whether the statement is true or false
True
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When warm, moist air mixes with cold air:
A) the cold air undergoes adiabatic expansion. B) cloud formation can result. C) the temperature of the mixed masses is usually that of the warm mass. D) the specific humidity of neither mass is affected.
The surface high and low pressure centers are steered by
A) Rossby waves. B) upper level flows. C) jet streams. D) all of these
Which statement about the Gulf of Mexico's dead zone is false?
A. The dead zone dissipates in fall with the arrival of storms and cooler weather. B. The Gulf of Mexico is stratified, with warmer, oxygen-rich water on top and cooler, low-oxygen water on bottom. C. Most oxygen in the bottom layer is consumed by bacteria decomposing algae. D. Engineering and wetland degradation contribute to dead zone formation. E. Negative effects from the dead zone are short-term and confined to the immediate area.
Reductions in death rates in recent centuries are due more to better food and sanitation than modern medicine.
Answer the following statement true (T) or false (F)