The separation of South America from Africa occurred during the

a. Triassic. d. Permian.
b. Jurassic. e. Tertiary.
c. Cretaceous.


B

Environmental & Atmospheric Sciences

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How far is a light year?

A) nearly 10 trillion km B) the distance of one Earth orbit C) 300,000 km D) all of the above

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Dinosaurs are examples of

a. fish. d. reptiles. b. invertebrates. e. mammals. c. amphibians.

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Rain forests only occur in equatorial areas

Indicate whether the statement is true or false

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About 10,000 kilometers above the surface is the upper limit of the ________

A) atmosphere B) homosphere C) troposphere D) thermosphere E) ionosphere

Environmental & Atmospheric Sciences