Atoms of carbon-14 are radioactive. The decay into atoms of the element nitrogen. Suppose that a sample of rock is taken from a fossil. The sample has 1000 of carbon-14 and 1000 atoms of nitrogen. If carbon-14 has a half-life of 5700 years, how old is the fossil ?

A. 2850 years old
B. 5700 years old
C. 17,100 years old
D. 11,400 years old

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

the answer is: metamorphic rocks often show the presence of fossils, also a

hope i

-lavira: )

the answer is c. it will give up it's valence electron to the other atom.