After the nebulae coalesced into a disk, what type of reactions helped the disk to transform to real stars?
a. Fusion reactions
b. Degradation reactions
c. Curing reactions
d. Bimolecular reactions
Answer: a. Fusion reactions
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Komatiites are common from the Archean eon, although none are produced in modern tectonic environments
a. True b. False
Which of the following components of MSW has most recently increased the most?
A) Glass B) E-waste C) Plastics D) Paper
If you were asked to describe some of the useful things that earth scientists might be involved in, which of the following would not be applicable?
A. Trying to predict when natural hazards might occur by using secret methods. B. Trying to understand what causes flooding so it can be prevented. C. Trying to predict the weather so farmers might know when to plant crops. D. Helping the public understand which areas and populations might be susceptible to earthquakes. E. All of these choices are correct.
In placer deposits, streams concentrate heavy mineral into ores.
Answer the following statement true (T) or false (F)