Approximately 26 million children each year suffer irreversible brain damage from a lack of ____.
A. cobalt
B. iodine
C. iron
D. calcium
E. phosphorus
Answer: B
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Indicate whether the statement is true or false
An active volcano is one that has erupted at least once in the last 25 years
Indicate whether the statement is true or false
One of Edwin Hubble's discoveries is that the known universe is expanding. This means that
A. light rays bend as they near the event horizon of a black hole. B. most all observable galaxies are moving away from each other. C. the mass of the universe is slowly dissipating. D. light rays undergo acceleration as they travel vast distances.
Because religious conversion is a deliberate repudiation of much of what came before, it can destroy a people's earlier culture more completely than political conquest
Indicate whether the statement is true or false.