The concept of a single world ocean emphasizes the interdependence of ocean and land, life and
water, atmospheric and oceanic circulation, and natural and human-made environments. correct
answersTrue
The total amount of fresh water on Earth makes up only about 2.5% of all the water on the
planet. correct answersTrue
Physical oceanographers design and build oil platforms, ships, harbors, and other structures that
enable us to use the ocean wisely correct answersFalse
Although oceanographers may specialize in one particular area of study, the nature of the science
is interdisciplinary, meaning that marine scientists must have a general knowledge of all areas of
oceanography in order to study the system as a whole. correct answersTrue
Once established, a theory is always correct and cannot be changed. correct answersFalse
The condensation theory explains how the ocean on Earth was formed. correct answersFalse
The fusion of hydrogen atoms into helium atoms occurs near the end of a star's life. correct
answersFalse
During the early years of Earth, lighter elements such as silicon, magnesium, and aluminum rose
to the surface, forming Earth's crust. correct answersTrue
Earth's moon is thought to have formed soon after the big bang similarly to how Earth formed.
correct answersFalse
Earth's early atmosphere was similar to the present day atmosphere, composed mostly of oxygen
and nitrogen. correct answersFalse
An anoxic atmosphere was needed for life to first form on Earth. correct answersTrue
The fact that all life cells depend on saline water suggests that life evolved in the ocean. correct
answersTrue
Earth's sun will become a supernova near the end of its life cycle. correct answersFalse
One of the conditions necessary for a planet to have a permanent ocean of liquid water is to have
a solid cold core. correct answersFalse
Magnetometer data has been used to determine if other planets and moons in our solar system
have salty oceans. correct answersTrue