Describe the two sources responsible for mercury exposure in humans.
What will be an ideal response?
First, humans eat fish and shellfish that can be contaminated with methylmercury, which accounts for 75% of all human exposure to toxic mercury. Second, humans inhale mercury particles in the air coming mostly from coal-burning power plants and solid-waste incinerators.
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Features associated with ancient continental rift zones include faults, dikes, and sills
a. True b. False
The addition of iron into ocean waters could drastically change the climate by allowing more carbon
dioxide from the atmosphere to be bound into carbohydrates via photosynthesis. Indicate whether the statement is true or false.
Under some circumstances, correlation between two regions can be made by assuming that similar rock types in the two regions formed at the same time.
Answer the following statement true (T) or false (F)
Which of the following is not one of the names associated with huge rotating masses of low pressure characterized by strong winds and torrential rain?
A) Cyclone B) Hurricane C) Typhoon D) Vortex