The IPCC Fifth Assessment Report on climate change announced that
A) global coordination to address climate change is not needed since it is mostly a local issue.
B) no consensus exists on whether current climate change is natural or anthropogenic.
C) the observed climatic changes of the past half century are similar to changes that have occurred through out the past couple hundred of years.
D) much uncertainty still remains related to the warming of the climate.
E) scientists are 95 to 100 certain that human activities are the primary cause of present climate change.
Question 2
The composition of soil is best described as
A) approximately 45 organic matter, 50 mineral matter, and 5 water and air.
B) roughly 45 mineral matter, 5 organic matter, and 50 air and water.
C) pebbles, gravel, cobbles, and a varying combination of sands, silts, and clays.
D) the very thin surface layer rich in organic matter with some other mineral matter in the mix.
E) primarily mineral matter (approximately 72), but also consists of organic matter (10), and water (18).
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