Deep-ocean sediment containing at least 30% biogenous material is called a(n) ____________. Fill in the blank(s) with the appropriate word(s)
ooze
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From the 1930s to the 1950s, an X-ray machine called a shoe-fitting fluoroscope was common in shoe stores
People would try on shoes, stand with their feet in the machine, and allow the salesperson to view live images of the bones of their feet in the shoes! Sometimes the salesperson would reach down and adjust the person's shoes for a better image. These machines used X-rays and exposed the feet of customers to 5 to 30 seconds of radiation. Further, lower doses of radiation exposure also occurred within about 10 to 15 inches of the outside of the machine. If you were looking for medical problems resulting from the use of these fluoroscopes in shoe stores, where would you expect the greatest harm? A) customers who had their feet exposed to the X-ray device B) the salespeople who operated the machine to sell shoes C) salespeople who worked in nearby stores D) the salesperson who worked behind the cash register in the store
Vertical air movement is necessary for the creation of a sea breeze
Indicate whether the statement is true or false
Which of the following features would you find in an ocean basin? CHOOSE ALL THAT APPLY.
a. circum-Pacific mountain belt b. Peru-Chili Trench c. Mid-Atlantic Ridge d. the Alps e. Canadian shield
Mount St. Helens and the related Cascade Range volcanoes represent the only volcanically active areas in the United States.
Answer the following statement true (T) or false (F)