Quiz 1 Flashcards
About ____ percent of Earth’s water is found in the ocean.
97.5%
The average depth of the ocean is about _____.
3,700 meters (12,000 ft)
The world ocean:
is the dominant feature of Earth and most of its living organisms.
In the scientific method, scientific theories:
must be tested and verified by observations.
Life on Earth probably evolved in the ocean. All of the following evidence supports this statement EXCEPT:
biosynthesis cannot occur without high concentrations of free oxygen, similar to the condition of Earth’s early atmosphere and ocean.
The most abundant form of matter in the universe appears to be:
hydrogen.
An example of another body in our solar system that has an ocean is:
Europa.
About 1.5 billion years ago, oxygen began to accumulate as a byproduct of _____, drastically changing the composition of the Earth’s atmosphere.
photosynthesis.
The death of a star is characterized by a massive release of energy called a _____.
supernova.
The primary physical property that sorts the Earth, ocean, and atmosphere is ______.
density stratification.
Based on evidence that supports the hypothesis regarding an ocean on Mars, which of the following statements is TRUE?
Mars may have had an ocean in ancient times, perhaps 1-3 billion years ago.
Planets other than Earth with liquid on or near the surface are _____.
less rare than we thought.
