If the temperature of the Earth warms up how does the carbon dioxide cycle respond?
A) it slows the formation of carbonate minerals in the oceans, thus pulling less carbon dioxide out of the atmosphere
B) it increases the rate of volcanic eruptions, thus increasing the rate of carbon dioxide production
C) it reduces the rate of volcanic eruptions, thus reducing the rate of carbon dioxide production
D) it speeds up the formation of carbonate minerals in the oceans, thus pulling more carbon dioxide out of the atmosphere
D
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Which of the following is an example of a longitudinal wave?
a. sound wave in air b. wave traveling in a string c. both a and b d. neither a nor b
Where is dark matter found in the periodic table?
A) within the noble gas elements B) the transition metals C) all radioactive elements D) no where at all
The formula for the Schwarzschild radius of a black hole of mass M is:
Rs = 3 × km What is the Schwarzschild radius of a 100 million-solar-mass black hole? A) 3 km B) 30 km C) 3000 km D) 300 million km E) 3 million km
It's cold! You are sitting on what appears to be an ice-covered world (water ice). The Sun is low on the horizon and circles the horizon about once every 24 hours
Despite the low Sun, you can almost "feel" the skin cancers appearing on your exposed face (because there is little ozone to protect you). Despite these discomforts, you are pleased to find that the air is quite satisfactory; oxygen seems plentiful, and you are able to breathe even without the life-support belt.