What does the fossil charcoal record tell us about atmospheric O2 levels?
What will be an ideal response?
There has been a continuous record of charcoal in sediments dating younger than 360 million years old. This indicates that O2 levels have not been greater than 1.5 PAL or less than 0.5 PAL during this time frame.
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Which is not one of the three main types of sediment grain?
A) clastic B) biogenic C) conglomeratic D) chemical
This region has the highest average number of hurricanes per year
A) Atlantic B) Eastern Pacific C) Western Pacific D) Northwest Indian Ocean
Gravitational pull on a dense, down-going plate at a subduction zone (slab pull) is one of the forces that keeps the lithospheric plates moving.
Answer the following statement true (T) or false (F)
Why do temperatures increase throughout most of the stratosphere? Specifically discuss the process that produces this warming effect.
What will be an ideal response?