Prompts+Link

On February 4, 1975, the Chinese government issued an immediate earthquake warning to the area of the city of Haichen and began a huge evacuation. Nine hours later, Haicheng experienced an earthquake of magnitude 7.3. Luckily, most of the population was outside when 90% of the city's buildings were severely damaged or destroyed. Injuries were few.
 * Chapter 5: Earth Science Review**

Although there have been other prediction successes in this region of China, the misses are frequent. On July 28, 1976, a 7.8 magnitude earthquake hit Tangshan, 150k east of Beijing, and home to over 1 million people. The hypocenter was located directly under the city, at a depth of 11 kilometers. About 93% of all buildings were destroyed and 240,000 people killed. Though the area was monitored, Chinese seismologists were caught off guard.

A) How are earthquakes caused? B) What is the difference between P waves and S waves? C) Should people be allowed to build in earthquake-prone areas?

 Characteristics of air masses and their world wide circulation patterns influence the spacial distribution of biomes and organisms that inhabit them.  A) Describe a Hadley, Ferrel, or polar cell in terms of what it is, how it develops, and its locations in reference to the equator. B) Describe the characteristics of that cell in terms of climatic conditions such as temperature, relative humidity, prevailing winds, and so on. C) Describe one biome that would exist at sea level within the specific latitudes of that cell. Give examples of both plants and animals that would exist within the biome.
 * Unit 1: Earth's Structure**
 * Unit 1.2: The Atmosphere**