Asteroids orbit the
A. Earth.
B. Sun.
C. Moon.
D. all of these
E. none of these
Answer: B
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What is the age of the oldest evidence yet found with remnants of life?
a. 1.5 billion years old b. 2.7 million years old c. 3.85 billion years old d. 4.2 billion years old e. 6 million years old
The stages of the epidemiologic transition are based on
A) causes of death at varying stages of the demographic transition. B) the means through which disease is transmitted spatially. C) non-contagious diseases such as heart disease, obesity, or diabetes. D) new food sources which produced population explosions. E) pandemics like the bubonic plague, influenza, or AIDS.
Of the five mass extinctions, the ________ extinction eliminated greatest percentage of genera.
A. Ordovician B. Triassic C. Cretaceous D. Permian
Dissolved gases may comprise up to a few percent by weight of a magma
Indicate whether the statement is true or false