A tidal or lunar day is exactly 24 hours long
Indicate whether the statement is true or false
False
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When a strong magnet is brought near to a sample which is known to contain both iron and sulfur the iron and the sulfur are not separated from one another. What type of material is this sample?
A) a compound B) a homogeneous mixture C) a heterogeneous mixture D) There is insufficient information to answer.
As Heezen and Tharp interpreted the ocean depth data, they identified what unusual feature that hinted at continental drift?
a) The oceanic ridges have a cleft, or rift, in the middle rather than a peak. b) The oceanic ridges have a broad, flat top very much resembling a table top. c) Ocean ridges are unique to the Pacific Ocean. d) They discovered a chain of very tall volcanoes in the middle of the Atlantic Ocean that do not rise higher than the sea surface. e) Ocean ridges abruptly stop after a few hundred kilometers and then start again after a few hundred more.
Aquaculture ________
A) produces less fish per unit area compared to ocean water harvesting B) frequently results in unintended catch of nontarget species C) can bring economic benefits and food security to many developing regions D) requires the flooding of fields to produce water-intensive crops such as cotton and rice E) has no real environmental disadvantages
The ____________________ to sustaining biodiversity involves protecting habitats, biodiversity and ecological services instead of individual species.
Fill in the blank(s) with the appropriate word(s).