Briefly explain the root cause of the increase in the world's population during the last 100 years
What will be an ideal response
Most of the world's population increase over the last 100 years occurred because of a sharp drop in death rates due to improved sanitation and health care, and not due to an increase in birth rates.
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Rainfall in mountain ranges might impact people living nearby by
A. increasing flooding hazards. B. increasing mudslide hazards. C. increasing erosion in mountains. D. water flowing into streams and rivers, increasing water supply. E. All of these choices are correct.
Read the following paragraph to answer the question:The Mt. St. Helens eruption in Washington state in 1980 measured 5 on the volcanic explosivity index (VEI). Only 57 people died from the Mt. St. Helens since most people were warned to evacuate the area prior to the event. Four years later, in 1985, Nevado del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars.Which of the following statements about volcano-related deaths best fit the information given in the paragraph?
A. Volcanic eruptions often kill thousands of people. B. The death toll from volcanic eruptions do not always correlate to explosivity, and can be affected by human actions before and after the eruption. C. The death toll from a volcanic eruption is directly related to its volcanic explosivity index (VEI). D. Most volcano-related deaths occur from lahars.
What does the presence of mudcracks indicate about the paleoenvironment?
A) There was immense pressure placed on these sediments, resulting in stress fractures. B) There was a current of water flowing in one direction. C) Waves were lapping on the shoreline of the ocean. D) There was a wet environment that is drying up.
A soil with a high cation exchange would likely be ________
A) dark in color B) sandy C) fertile D) impermeable E) thin