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OCN. Exam 1 Questions and Answers 100% correct 2023
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Exam of 15 pages for the course OCN at OCN (OCN. Exam 1)
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OCN. Exam 1Science is a powerful way to find out about the natural world, but it has its limitations. -
answer T
Latitude can be told from the declination of the Pole Star, whereas longitude requires an
accurate clock. - answer T
Current scientific theories suggest that the universe is 10-15 billion years old - answer
T
Refractory elements are those that tend to form gases, even at relatively low
temperature - answer F
The four inner planets are relatively richer in volatile elements and compounds than are
the four outer gas-giant planets. - answer F
Oceans of liquid water are common in our Solar System. - answer F
An hypsometric curve shows two levels on Venus and only one on Earth. - answer F
The atmospheres of Earth and its nearest neighbors, Venus and Mars, are similar. -
answer F
Earth is believed to have originated by accretion from planetesimals. - answer T
The age of the Earth is indistinguishable from that of the Moon and meteorites: about
4.5 billion years. - answer T
Seismic S-waves do not travel through liquids and this indicates that at least part of the
Earth's core is molten. - answer T
Earth is not massive enough to retain all of its constituent chemical elements. - answer
T
Free oxygen has always been an important component of the Earth's atmosphere. -
answer T
The oldest rocks from the seafloor are much younger than the oldest rocks from the
continents. - answer T
, The amount of land exposed above sea level has remained about the same for the last
600 million years. - answer F
The oceanic crust is much thicker than the continental crust - answer F
The Hawaiian Islands are an example of island arc volcanism. - answer T
Worldwide, sea level is falling today - answer F
The deep sea is a promising place to explore for oil and gas - answer T
Seawalls are usually effective in preventing beach erosion - answer F
Earth contains elements that were formed in a supernova explosion - answer T
The Earth is believed to have originated by accretion from planetesimals and planetary
embryos - answer T
Venus has a similar outgassing history to Earth, and similar surface conditions - answer
F
The Earth is about 4.5 million years old - answer T
Continental crust is too buoyant to be subducted - answer T
The depth of the seafloor is linearly related to the square root of its age out to about 80
million years - answer T
Hotspots can occur both at plate boundaries and in the middle of plates, and both in the
oceans and on the continents. - answer T
On the island of Oahu, sea level is falling at present - answer F
The Pacific Ocean has the highest rate of input of terrigenous sediment of any of
today's oceans - answer F
Beaches are normally very stable in shape and width unless disturbed by human
activities - answer F
Earth's crust originated by solidification of molten rock that rose up from the mantle. -
answer T
Because seismic s-waves do not travel through liquids, the s-wave shadow zone
indicates that at least part of the Earth's core is molten - answer T
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