Rayed craters like Tyco and Copernicus are known to be younger than the lunar maria because ________
A) they contain volcanos in their centers which indicate the moon still had magma available when they formed
B) their ejecta, seen as rays, lies across the surface of the maria
C) they are formed on lunar highlands that are known to be younger than the maria
D) they have been dated directly by radiometric dating of samples
B
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Moldova, after it became an autonomous republic sought ethnic reunification with
A) Bulgaria.
B) Hungary.
C) Austria.
D) Romania.
E) Slovenia.
Ensemble forecasting is the best technique for predicting weather patterns a month or more in advance
Indicate whether the statement is true or false
Which of the following is true of ionization energies as one moves left to right across a period of the periodic table?
A) They consistently decrease. B) They consistently increase. C) They generally decrease, but there are some exceptions. D) They generally increase, but there are some exceptions.
Hygroscopic water and gravitational water are available for plant use
Indicate whether the statement is true or false