The fusion of hydrogen atoms into helium atoms occurs near the end of a star’s life
a. True
b. False
False
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Each year, U.S. fire departments respond to more than ____ fires started by lightning in the United States.?
a. ?2,000 b. ?50,000 c. ?10,000 d. ?20,000 e. ?50,000
What will be the role of government in affecting the transition from nonrenewable, polluting energy sources to renewable, environmentally-friendly energy sources?
What will be an ideal response?
Alternative energy sources
A. are all renewable (except for nuclear energy). B. are sources of electricity and heat that emit little or no carbon dioxide. C. include solar, geothermal, biomass, and nuclear. D. All of these
Sources of uncertainty in radioactive dating do not include:a
loss of daughter isotope. b. uncertainty in decay constants. c. experimental and sample error. d. addition of parent isotope. e. questions about metamorphism