How do geologists do correlation using rocks and fossils? What will be an ideal response?
Rock types can be matched up on the basis of similar rock type and superposition, but correlation of
this type can be done only in a limited area where beds can be traced from site to site. To correlate
over larger areas or rocks of different composition, fossils must be used. Fossils are useful because
many organisms lived for a certain length of time. The overlapping geologic ranges of fossil species
allow definition of time intervals because each species is unique and had a definite duration.
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If a chemist wishes to carry out a reaction in which one reactant is a solid and one is a liquid, which of the following will be most effective in speeding up the reaction?
A) adding more liquid reactant B) grinding the solid to a form a powder C) placing a larger crystal of the solid in the same volume of liquid reactant D) All of the above will be equally effective.
Which of the following will change the numerical value of the equilibrium constant of a particular reaction?
A) increasing the concentration of the reactants B) increasing the concentration of the products C) both a and b D) neither a nor b
The ultimate base level is
A) dependent on the geological substrate. B) a dam. C) sea level. D) a drainage divide.
Meaningful measurements of temperature must always be made in the shade because
A) a thermometer exposed to direct sunlight will be warmed by the absorption of insolation and assume a temperature greater than that of the air B) a thermometer exposed to direct sunlight will be warmed by convection and assume a temperature greater than that of the air C) a thermometer exposed to direct sunlight will be warmed by the absorption of latent heat and assume a temperature greater than that of the air D) a thermometer exposed to direct sunlight will cool by radiation and assume a temperature less than that of the air