What type of eruption is shown in this photograph?
A. pyroclastic column
B. lava dome
C. lava flow
D. pyroclastic flow
E. lava fountain
Answer: B
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Where is the world's largest glacier located?
A) Greenland B) Asia C) Antarctica D) Minnesota
Around the world, rockfalls are expected to become more common because of increased ________
A) earthquakes B) droughts C) temperatures D) tectonic mountain building E) human population
The Chernobyl disaster in 1986 was what type of environmental disaster?
A) a collapse of a poorly regulated dam B) a massive oil spill into the Volga River which flowed into the Caspian Sea C) a massive coal mine fire which continues to burn to present day D) a meltdown of a nuclear reactor which spewed airborne radioactive waste across thousands of acres of farmland E) a dumping of toxic waste into the Arctic Sea causing a massive loss of fisheries
What are the primitive organisms thought to have been responsible for the development of Earth’s oxygen-rich
atmosphere in the Precambrian? a. tillites b. cyanobacteria (blue-green algae) c. foraminifera d. diatoms e. prokaryotes