Chapter 1 Flashcards
How did life, biosynthesis begin?
Theories only
Where did basic carbon compounds come from
Comets, meteors, asteroids, interplanetary dust
What do all living things have in common?
Water. Saline water. In all cells (blood, tears)
When will our sun die
5 billion years
How old are earth and oceans
Earth: 4.6 billion
Oceans: 4 billion
Percentage of water is
97.5 salt 2.5 fresh water
Marine geologists
Composition of earth, mobility of crust, history of earth
Physical oceanographers
Wave dynamics, currents, ocean atmosphere interactions
Chemical oceanographers
Oceans dissolved solids and gases
Marine biologists
Nature and distribution of marine organisms
Stars change helium and hydrogen into what?
Heavier elements
How was ocean formed?
Water vapor in earths outer layers escaped to surface through volcanic activity during planets youth. Vapor cooled and condensed to form the ocean
Earths heavier elements came from
The death of ancient stars