M31 in Andromeda is a bigger version of our Galaxy, and the largest member of the Local Group
Indicate whether the statement is true or false
TRUE
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Which of the following stars has the hottest surface temperature?
A) the blue star B) the orange star C) the green star D) the red star E) the yellow star
What event triggered the dramatic increase in atmospheric carbon dioxide concentration seen over the last couple of centuries?
A) the invention of CFCs B) the invention of the automobile C) the Tunguska meteoric impact D) the volcanic eruption in Iceland in 1783 E) the Industrial Revolution
Which of these, all of the same length, has the greater electrical resistance?
A) a copper rod B) an iron rod C) a rubber rod D) all about the same E) none of the above
Sodium hydroxide, NaOH, is a strong base, which means that it readily accepts hydrogen ions. What products are formed when sodium hydroxide accepts a hydrogen ion from a water molecule?
A) water and sodium hydroxide B) sodium hydroxide and hydronium ions C) sodium ions and hydronium ions D) sodium ions and water