New rocks that have had their original form altered by heat and pressure, but without melting, are classified as
a. sedimentary.
b. metamorphic.
c. igneous.
d. all of these.
b
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Which of the following histories are in the correct order of occurrence?
A) The Big Bang, then the expansion starts, then the Sun and stars make the first elements heavier than helium. B) The Big Bang, then the expansion starts, then stars make the first elements heavier than helium, then the Sun forms. C) The Big Bang happens simultaneously with the start of the expansion of the universe, then the Sun and stars make the first elements heavier than helium. D) The Big Bang happens simultaneously with the start of the expansion of the universe, then stars make the first elements heavier than helium, then the Sun forms.
Some dark matter may be ordinary matter that orbits in the halo of the galaxy. Which of the following would not be considered a type of ordinary dark matter?
A) you, if you happened to be floating in the halo of the galaxy B) globular clusters in the halo of the galaxy C) planets in the halo of the galaxy D) brown dwarfs in the halo of the galaxy
The planet ______________ has the largest moon in the solar system
Fill in the blank(s) with correct word
A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit. How high is the fence?
a. 8.2 m b. 15.8 m c. 13.5 m d. 11.0 m e. 4.9 m