A red giant has ________
A) a hydrogen-rich core
B) high gas pressure
C) a helium-rich core
D) no outer shell
E) an iron-rich core
C
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The population theory held by Thomas Malthus was that the human population would:
A. Maintain equilibrium with its carrying capacity B. Reach its environment's carrying capacity and then maintain equilibrium C. Never reach its environment's carrying capacity D. Outstrip its resources, then suffer starvation and misery E. Develop a modern utopia
Over time, a butte may be eroded to form a mesa
Indicate whether the statement is true or false
What group of islands in the South China Sea are claimed by the Chinese?
A) Hokkaido B) Senkaku/Daioyu C) Spratly Islands D) Macao E) Okinawa