What are Saturn's rings composed of?
A) chunks of ice and rock
B) methane gas
C) hydrogen
D) old satellites and other space junk lost from Earth's orbit and other space missions
A
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Which of the following statements about environmental conditions in Russia is true?
B. The Chernobyl accident was the only incidence of radioactive pollution. C. The Aral Sea is larger now than it was before the Communists came to power. D. The Black Sea was unaffected by Soviet industrial development.
Which of the following is an ecological legacy?
A) woody debris left after a fire B) hurricane C) logging of forests D) fire E) water
Which of the following must we know when we carry out a titration?
A) the concentration of all the reactants B) the stoichiometric ratio of the reactants C) both a and b D) neither a nor b
Carbon dioxide in seawater keeps the water's pH ________.
A. strongly alkaline B. neutral C. strongly acid D. slightly alkaline E. slightly acid