Species that migrate or are accidentally introduced into an ecosystem are called
A. nonnative species.
B. native species.
C. keystone species.
D. specialist species.
E. indicator species.
Answer: A
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When freight cars collide, momentum is conserved in
A. elastic collisions. B. inelastic collisions. C. both of these D. none of the above
What additional evidence did William Smith utilize to make his correlations?
A) fossils in different layers in the same mine B) fossils in the same layers in different mines C) chemical composition of coal seams in different mines D) chemical compositions of rock layers in the same mine
The doldrums are associated with what latitude(s)?
A) the poles B) the midlatitudes C) the Tropic of Cancer D) the equator
Land heats and cools more rapidly than the ocean because of its
A. lower specific heat when compared to the ocean. B. ability for land to retain heat better than the ocean. C. great potential for latent heat on land through evaporation. D. strong mixing through soil horizons on land.