Carbon and oxygen atoms do not show up as well as calcium and magnesium atoms on a transmission electron microscope image of dolomite. Why?
A) There are not as many carbon and oxygen atoms.
B) Carbon and oxygen gases are transparent to light.
C) The electrons are not as densely packed in carbon and oxygen.
D) Transmission electron microscopes perform better on metals than nonmetals.
Answer: C
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Which of the following factors favors movement of a rock slide?
A) Layers that are inclined opposite to the slope of the hill B) Solid rock with few preexisting joints or faults C) A massive rock with no bedding or other through-going discontinuities D) A valley or other open space downslope from the rock slide
The designation of sediment grain size, from largest to smallest, is:
a. clay, silt, sand, gravel. b. gravel, sand, silt, clay. c. gravel, silt, sand, clay. d. clay, sand, gravel, silt. e. silt, clay, gravel, sand
The greatest seasonal change in the period of daylight is experienced at the
A) Equator. B) Tropic of Capricorn. C) North and South Poles. D) Tropic of Cancer.
Which one of the following is likely to be associated with a loss of genetic diversity in a local population of a species?
A. The arrival of individuals of the same species from distant populations. B. Genetic mutations. C. A 90% reduction in the size of the population. D. Mating with individuals from other populations.