Graphene, one of the world's strongest-yet thinnest, light, flexible, and stretchable-materials, is composed of ____.

A. iron
B. titanium
C. carbon
D. silver
E. silicon


Answer: C

Environmental & Atmospheric Sciences

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Toxicologists refer to the total amount of a chemical present in the tissues of an organism as ________

A) toxic content B) threshold content C) biomagnification D) bioaccumulation E) body burden

Environmental & Atmospheric Sciences

A sports car that maintains a constant velocity of 120 km/h for one-half hour has an acceleration of

A. 120 km/h. B. 240 km/h. C. 60 km/h. D. zero because of no change in velocity.

Environmental & Atmospheric Sciences

On this map of southeastern Asia and adjacent areas, which site would have earthquakes along a subduction zone?



A) 1, in the Indian Ocean
B) 2, in Tibet
C) 3, near Japan
D) 4, near the Tonga island arc
E) 3 and 4

Environmental & Atmospheric Sciences

The greatest future growth in human numbers is expected to occur in the

A. developing nations. B. rich countries of Europe and North America. C. rich Asian countries including Japan.

Environmental & Atmospheric Sciences