Basaltic rocks make up most of the sea floor
Indicate whether the statement is true or false
TRUE
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What do we call the bioregion that is dominated by tall native grasslands, short grasses, or scrub vegetation in North America?
A) boreal forest B) farmland C) prairie D) tundra E) desert
What can you deduce about the activation energy of a reaction that takes billions of years to go to completion? How about a reaction that takes only fractions of a second?
A) The activation energy of both these reactions must be very low. B) The activation energy of both these reactions must be very high. C) The slow reaction must have a high activation energy while the fast reaction must have a low activation energy. D) The slow reaction must have a low activation energy while the fast reaction must have a high activation energy.
Which of the following is the Principle of uniformitarianism?
a) all rocks were originally deposited horizontally b) all the rocks were depoisted with the youngest on the bottom c) the present is the key to the past d) all the rocks were deposited with the oldest on the bottom
As they formed, due to their high temperatures and comparatively weak gravitational fields, which planets were unable to retain appreciable amounts of hydrogen, helium, and ammonia?
A) Neptune and Uranus B) Mercury and Earth C) Jupiter and Uranus D) Jupiter and Neptune E) Uranus and Pluto