What is the process in which unstable atoms of an element decay and emit excess energy in the form of particles or waves?
a. Radioactivity
b. Organic decomposition
c. Ionic emission
d. Nuclear decay
Answer: a. Radioactivity
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What is a main hazard of this type of volcano?
A) Hot fragments thrown a short distance from the volcano
B) Burning, building collapse, and suffocation from widely distributed pyroclastic material
C) Destruction by viscous lava flows that can flow far from the volcano
D) Volcanic mudflows and landslides
E) Relatively small pyroclastic eruptions caused by localized explosions or collapse
According to the elevation scales on the sides of the on-screen shaded relief
map, what is the range of elevation values (lowest to highest) for the New York City area? What will be an ideal response?
How much water is there on Earth, and how much is available for human usage? Use in your answer the concept that Earth's water budget is just 100 liters
What will be an ideal response?
What disease has the likeliest potential to depopulate large parts of the world in the 21st century?
A) AIDS B) bubonic plague (Black Death) C) H1N1 (subtype of Influenza A virus, sometimes called swine flu) D) H5N1 (bird flu) E) smallpox