Boundaries between intervals of the geological time scale are determined by
A) dividing the time range of the interval by the number desired subdivisions, thereby creating equal intervals between the divisions.
B) Major events in the Earth's history, such as major extinctions.
C) using a quantile method whereby the number of years in each subdivision is determined by dividing the number of years by the desired number of classes.
D) Climatic periods based on paleoclimatological reconstructions.
B
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A) a measure of secondary energy B) a measure of intrinsic value C) the proven reserves D) the energy conversion efficiency E) the energy return on investment (EROI)
Effects attributed to Chernobyl ________
A) include increased incidence of thyroid cancers B) were contained within the Ukraine C) include increased incidence of emphysema D) have not been extensively documented E) include serious respiratory illnesses but no fatalities
Which of the following is a depositional landform created by glaciation?
A) cols B) horns C) U-shaped valleys D) stratified drift
The Industrial Revolution caused people to pay more attention to time on an hour-by-hour basis
Indicate whether the statement is true or false