Eras are subdivided into

A. eons
B. epochs
C. periods
D. ages


Answer: C

Environmental & Atmospheric Sciences

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An interrelated collection of plants and animals and the physical environment with which they react is a(n)

A) biome. B) ecosystem. C) biomass. D) biosphere.

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Malaria cannot be transmitted by blood transfusions or by sharing needles

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which chain of volcanic islands are far removed from a plate boundary?

A) Philippines B) Iceland C) Indonesia D) Hawaii E) Japan

Environmental & Atmospheric Sciences

When potassium loses an electron to form K+, which electron is lost?

A) 1s B) 2s C) 3s D) 4s

Environmental & Atmospheric Sciences