Numerical dates based on radioactivity are very important for studying Precambrian geologic history because fossils are rare or absent.
a. true
b. false
a. true
You might also like to view...
The Grameen Bank originated in which country?
A) Nepal B) Sri Lanka C) Bangladesh D) Pakistan E) India
A population growth rate of 1% means a population will double in 70 years (70/growth rate). China's growth rate is 0.65%, which means
A. its population of 1.3 billion will reach 2.6 billion by 2080. B. at the current rate, its population would double in 108 years. C. the population has already begun to decrease from its peak 1.31 billion. D. China needs to reconsider its one-child policy
Drylines typically occur in the ____
A) Pacific Northwest of the United States B) southern Great Plains of the United States C) northeastern United States D) southeastern United States
Interglacial periods are: a. very slow-moving periods
b. extended periods when glaciers covered the earth. c. warm periods between glacial advances. d. None of these choices.