________ is a deposit of calcite that forms around hot springs.
A. Hematite
B. Travertine
C. Sinter
D. Stalactite
E. Quartz
Answer: B
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Which of the following is an atmospheric age?
A - carbon dioxide B - nitrogen C - water vapor D - oxygen E - they are all gases
Methane can exhibit ________ times more greenhouse potential than carbon dioxide.
A. 2 B. 250 C. 1000 D. 25 E. 5
Tsunami detection networks are ____
a. ?accurate at predicting the arrival of a nearby tsunami, but not a far-field tsunami b. ?rapid enough to predict the arrival of a tsunami generated nearby in time for people to evacuate c. ?inaccurate at predicting arrival times of tsunamis generated in the middle of the Pacific Ocean d. ?accurate at predicting the arrival of a distant tsunami, but rarely provide sufficient warning of tsunami generated by a nearby earthquake e. ?available in the Atlantic but not the Pacific Ocean
Which of the following technologies is currently allowing us to decrease carbon emissions from automobiles?
A) the internal combustion engine B) hydrogen fuel cells C) wind-powered vehicles D) solar cars E) nuclear cars