Four of the five plant species listed below are dubbed "nature's pharmacy" because once the active ingredients in the plant are identified, scientist can usually reproduce them synthetically. Which plant is the exception?
A. Pacific yew
B. foxglove
C. yarrow
D. rosy periwinkle
E. cinchona
Answer: C
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A speeding truck slams on its breaks and skids to a stop. If the truck were heavily loaded so it had twice the total mass, the skidding distance would be
A) half as far. B) one-and-a-half times as far. C) 2 times as far. D) 4 times as far. E) the same.
Most earthquakes occur along the circum-Pacific belt primarily because ____
A)of the convergence along plate margins B)of the divergence along plate margins C)Earth's crust is more rigid in these areas D)P- and S-waves are stronger in those areas due to the greater density of Earth's crust E)S-waves travel easily through water
Frost prevention by air mixing requires that a temperature inversion be present in the air layer near the ground
Indicate whether the statement is true or false
On January 12, 2010, the country of Haiti was rocked by a violent M 7.0 earthquake. This quake caused widespread devastation and resulted in the death of over 300,000 people
A month later, an M 8.8 earthquake rocked central Chile, where over 80 percent of the country's population was concentrated. However, only 525 people were reported dead for this disaster. Why would Chile's earthquake, with a higher magnitude, have a lower death toll than Haiti's earthquake? What will be an ideal response?