Carbon dioxide levels in the atmosphere first began to rapidly increase above natural levels around 1950.
Answer the following statement true (T) or false (F)
False
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The 2011 nuclear power accident in Japan
A. was a result of global warning B. increased the public confidence in nuclear power safety and regulation C. exposed several design flaws and a failure to develop worst-case scenarios D. will not lead to increased cancers due to the quick and efficient clean-up response E. is no longer leaking nuclear waste into the ocean
Assuming the world population growth rate is 1% and the current population is about 7 billion, next year the population will be:
A) 7.01 billion B) 7.1 billion C) 7.5 billion D) 8 billion
In a certain chemical reaction 1.00 gram of product is produced in 15 minutes when the reaction is carried out at 20°C. Assuming that there is sufficient starting material available, about how much product will be produced in the same length of time if the reaction is carried out in a boiling water bath at 100°C?
A) 2.00 g B) 16.0 g C) 64.0 g D) 256 g
The basic idea behind the planetesimal hypothesis is that
A) planets form as a direct result of the nuclear fusion of nebular gases and planetesimals. B) small grains of cosmic dust and other solids gradual accrete to form planetesimals that may grow to become protoplanets and eventually planets. C) early in the solar system's history, a star passed near to the Sun and pulled off gases that eventually condensed to form planets. D) planets form from the remains of super-giant planetesimals that undergo nuclear fission and blow apart, thereby creating smaller objects—the planets.