On land, a traveler would notice a decrease in primary productivity by traveling from the tropics to the higher latitudes
Indicate whether the statement is true or false
T
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If the pillar in Alexandria were taller and the well in Syene were deeper, Eratosthenes' calculation of Earth's size would be
A. smaller. B. larger. C. no difference. D. impossible to say.
The grand recycling of the upper few hundred kilometers of Earth is called the tectonic cycle.
Answer the following statement true (T) or false (F)
Proven environmental impacts of the transmission of electricity have been associated with intermittent ________
A) use of PCBs in transformers B) air pollution surrounding coal mining C) radioactive effects of electricity D) electromagnetic fields E) use of heavy metals in transmission lines
What is the source of heat in geothermal power?
A. Radioactive elements inside the Earth B. Coal burning C. Active heating by solar energy D. Combustion of synfuels