What two events likely caused the extinction event at the end of the Cretaceous?
A. a massive fall in sea level and volcanic eruption
B. an ice age and asteroid impact
C. the evolution of mammals and an ice age
D. a global fire and related fireball impacts
E. an asteroid impact and massive flood basalt eruption
Answer: E
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Which of the following molecules could be a structural isomer for the underlined molecule below?
A. a B. b C. c D. all of the above E. none of the above
The presence of ____________________ in the upper 40 m or so of a glacier indicates that this portion behaves not as a plastic, but as a(n) ____________________ solid
Fill in the blank(s) with correct word
As an ice sheet recedes and its weight on the land is removed, the land surface sinks downward by the process of isostatic rebound
a. True b. False Indicate whether the statement is true or false
Which of the following is responsible for 90% of the deaths associated with hurricanes?
A) Fallen trees B) Fflooding C) Landslides D) Storm surge E) Strong winds