Which of the following rocks will be most buoyant on the Earth's mantle?
Rock A: Density 1.4 g/cm3
Rock B: Density 5.6 g/cm3
Rock C: Density 5.1 g/cm3
Rock D: Density 2.7 g/cm3
A) Rock A
B) Rock B
C) Rock C
D) Rock D
Answer: A
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The Yucca Mountain nuclear depository in Nevada has been deemed unsafe by some scientists because
A. rock fractures and cracks may allow water to leak and flow through the site. B. it is too big to store existing radioactive wastes. C. of the threat of tsunamis. D. there is a risk of potential landslides. E. it is not close enough to a large city.
Why does temperature data collected in more recent times have less uncertainty than for the past?
What will be an ideal response?
An estimated ________ people could be displaced by a sea level rise of 1.0 m (3.2 ft)
A) 1,000,000 B) 10,000,000 C) 100,000,000 D) 130,000,000
Natural barriers are often based on formal boundaries
Indicate whether this statement is true or false