What is the world's leading renewable energy source used to produce electricity?
A. hydrogen
B. biomass
C. ethanol
D. hydropower
E. coal
Answer: D
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Toxicology is a science devoted to the study of risks to human life
Indicate whether the statement is true or false
Nanoscience has shown that
A. a physical change can occur when using a scanning probe microscope. B. the properties of a material can be different on the level of atoms then its properties when the material is analyzed in bulk. C. a chemical occurs with the use of a scanning probe microscope. D. DNA is the smallest molecule.
Which location on this figure from the Investigation is most likely to have volcanoes formed above a subduction zone?
A. 1 B. 2 C. 3 D. 4 E. 5
Why is the gross national product an inaccurate indicator of a nation's economic status? How can it be corrected?
What will be an ideal response?