By measuring the 18O/16O ratio of water in ice cores or shells in fossil shells, geologists can recover the temperature changes in Earth's history.
a. true
b. false
Answer: a. true
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Fog can form through each of the following ways except
A) by increasing the moisture content until vapor pressure reaches the water-vapor capacity. B) by decreasing the moisture content of the air and increasing temperature. C) by cooling the air until it reaches the dew-point (or frost-point) temperature. D) by a combination of cooling and increasing humidity.
The New World Monkeys evolved in Central and South America after those landmasses split from Africa
a. True b. False
Which of the following creates a major problem for scientists studying a particular cycle of glaciation?
a. subsequent glaciation b. changes in sea level c. human activity d. changes in wind direction
In much of what is now Canada, glaciers covered the land as little as 12,000 years ago and glacial erosion scoured the land surface leaving very thin soil or bare rock over large areas
The Midwestern United States was also covered in ice at this time, yet this area contains some of the richest farm land in the world with thick soils. These soils are formed on glacial sediments and windblown dust deposits from the ice age. Why are the soil conditions between these areas so different when the soils are virtually identical in age? A) The Midwestern soils are transported soils with soil development on materials that were already loose, unconsolidated materials. B) The Midwestern U.S. is much flatter than Canada, allowing soils to develop more quickly. C) It is much colder in Canada so chemical weather is much slower; thus and soils have not had time to form. D) Sea level rose following the ice age and covered the Midwest with an inland sea, rapidly forming soil.