Carefully examine the relative positions of the lettered arrows on the timeline below and estimate the ages represented by each arrow. Use the chart to answer this question.
Which represents the rise in atmospheric oxygen on Earth?
A. A
B. B
C. C
D. D
E. E
F. F
Answer: C
You might also like to view...
Outwash plains usually contain a thick layer of rocks deposited close to the glacier in a layer of sand and gravel that can exceed a thickness of 330 feet
Indicate whether the statement is true or false.
Generally, global cities are divided into:
A) categories called forward-leaning, stagnant, and backward-leaning cities. B) two levels, called primate and non primate cities. C) three levels, called alpha, beta, and gamma. D) four levels, called alpha, beta, gamma, and delta. E) none of the above.
In air, as temperature increases, density ________; as water content increases, density ________
a. increases; decreases b. decreases; increases c. decreases; decreases d. increases; increases
A specific example of nonconsumptive use of water is ________
A) commercial forestry B) disposal of sewage wastewater C) agriculture D) cattle-grazing operations on federal lands