Cratons formed first in Proterozoic and then led to supercontinents.
a. true
b. false
Answer: a. true
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Using the numbers 1, 2, and 3 to designate each of the three soil horizons, place these numbers in the appropriate locations on the soil texture triangle in Figure 28.2.
In the textural analysis of mineral particle sizes, the A horizon is mainly made up of _______ the B horizon is mainly made up of _______ and the C horizon is mainly made up of _______.
Fill in the blank(s) with the appropriate word(s).
The range of a service is the minimum number of people needed to support the service
Indicate whether the statement is true or false.
A meteorite impact crater can be distinguished from a volcanic crater through the presence of
A) volcanic rock B) high pressure metamorphic minerals C) dust surrounding the crater D) a raised crater rim
Which of the following terms describes organisms that live on the bottom yet also have the ability to swim or crawl through the water above the ocean floor?
A) Benthonektos B) Epifauna C) Infauna D) Nektobenthos E) Planktofauna