The upper part of the ocean into which sunlight penetrates is called the photic zone
Indicate whether the statement is true or false
TRUE
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What prompted the first widespread mapping of the ocean floor?
a) The sinking of the Titanic b) he creation of NASA c) The importance of submarine warfare during World War II d) The laying of undersea telegraph lines between the United States and Europe e) Conflicts over maritime (ocean) territorial claims during the 1970s
In closed loop recycling, ________
A) a material is recycled into a different product B) materials are incinerated without first recovering what is recyclable C) the product is made from another type of material and discarded after use D) materials are recycled an infinite number of times E) the product is reused to produce a similar product
If the tidal current is maximum at mid tide level, the tide is a progressive wave type.
Answer the following statement true (T) or false (F)
How did the Greeks estimate the size of the earth?
A) They measured the angle of the sun above the horizon at midday in two places with different latitude and used the angle to estimate the circumference of the earth. B) They used the height of sailing ships as they sailed over the horizon to estimate curvature of the earth, which allowed estimation of the size of the earth. C) They didn't; everyone thought the world was flat until Columbus' time. D) They measured the altitude of mountains in Greece, then used the distance they were lost from sight to estimate the curvature of the earth, which allowed estimation of the size of the earth.