Carbon-14 dating is based on the ratio of the parent isotope ____________________ to the daughter
isotope ____________________. Fill in the blank(s) with the appropriate word(s).
Carbon 14 is useful for archeological samples because it is effective back to approximately
____________________ years.
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Tens of thousands of people were killed in the 1991 Pinatubo eruption because of a lack of prediction of the eruption
Indicate whether the statement is true or false
Which of the following compounds is insoluble in water?
A) CaCO3 B) CaCl2 C) Ca(NO3)2 D) Ca(C2H3O2)2
Which of the following bases has the weakest conjugate acid?
A) CH3COO- B) C6H5O- C) HSO4- D) H2PO4-
________ is the process by which sediment grains are selected and separated according to grain size by agent of transportation.
A. Segregation B. Selection C. Grading D. Distillating E. Sorting