Most of the energy used worldwide comes from renewable energy sources.
Answer the following statement true (T) or false (F)
False
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European colonization of the New World resulted in the greatest loss of human life in history. The primary factor responsible was
A) disease. B) war. C) slavery. D) fire. E) famine.
Why is heat often added to chemical reactions performed in the laboratory?
A) to allow a greater number of reactants to pass over the activation energy B) to increase the rate at which reactant collide C) to compensate for the natural tendency of energy to disperse D) all of the above
Which of the following statements about a scientific theory is not true?
a. It is an explanation for some natural phenomena. b. It has a large body of supporting knowledge. c. It is testable. d. It is conjecture or guess. e. none of the above
Which of the following is associated with a high leukocyte count?
A) anemia B) polycythemia C) leukemia D) typhoid