Intrusive igneous rock formations that cut more or less vertically across older formations are said to be ______________
Fill in the blank(s) with correct word
discordant
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A silver conductor
A scientific model can never be exactly correct
Indicate whether the statement is true or false
According to our theory of solar system formation, why does the Sun rotate slowly today?
A) The Sun once rotated much faster, but it transferred angular momentum to charged particles caught in its magnetic field and then blew the particles away with its strong solar wind. B) The Sun once rotated much faster, but it transferred angular momentum to the planets during the parts of their orbits where they come closest to the Sun. C) The Sun once rotated much faster, but it lost angular momentum due to internal friction. D) The Sun once rotated much faster, but it lost angular momentum because everything slows down with time. E) The Sun was born rotating slowly because the solar nebula had very little angular momentum.
Which of the following is not a piece of evidence supporting the idea that Europa may have a subsurface ocean?
A) Photos of Europa's surface show regions that appear to consist of jumbled icebergs frozen in place. B) Astronomers have detected small lakes of liquid water on Europa's surface. C) Europa has a magnetic field that appears to respond to Jupiter's magnetic field. D) Europa's surface shows very few impact craters.