The current rate of extinction is between _____ and _____ times the rate that existed before humans arrived on Earth
a. 5 and 10
b. 10 and 100
c. 100 and 1,000
d. The rate is the same as it was before humans arrived on earth.
e. There is no way to determine the extinction rate before humans arrived on earth, so these numbers cannot be estimated or compared.
C
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During sedimentation, materials are often sorted by ________.
A) shape B) color C) porosity D) size E) atomic weight
Which of the following has NOT been used to create social identities and/or power differences among groups?
A) sexuality B) racialization C) gender D) ethnicity E) All of these examples have been the basis for identity and power differences.
The circular-shaped mass of ice shown in the center of the photograph below is a(n)
A) cirque glacier.
B) ice sheet.
C) snowfield.
D) ice shelf.
A country's renewable water supplies are generally made up of
A. Water used from an aquifer B. Seasonal flooding and infiltration into accessible aquifers C. Seasonal flooding D. Surface runoff and infiltration into accessible aquifers E. Rivers running through the country