What do changes, as a function of time, in the ratio of 180 to 160 in the shells

Question

What do changes, as a function of time, in the ratio of 180 to 160 in the shells of plankton tell us? that sea water temperature changes with time, because the ratio of isotopes incorporated into shells depends on temperature that plankton species have evolved in ways that make them preferentially incorporate one isotope instead of the other that plankton shells lose one isotope faster than they lose the other that if you add 2 to the number 16, you usually get 18 that the atmosphere has undergone unidirectional change over long periods of time The following statements characterize the recent behavior of atmospheric CO2. Which is correct? It is rising, but not unusually so There are not enough data to be sure It is decreasing, due to pollution. It is fluctuating as it has in the past. It is off the chart, man! Which of the following is the main contributor to erosion in deserts? ice related processes unthoughtful partiers heat infrequent but heavy rainfall wind Which of the following statements about sea level is correct? Sea level is rising by.1-.2 mm/year Sea level is rising by 1-2 m/year Sea level is rising by 1-2 cm/year Sea level is rising by 1-2 mm/year Sea level is not rising, but projected to rise in the near future by around 1-2 mm/year

Explanation / Answer

1. what do changes, as a function of time in the ration of 180 to 160 in the shells of plankton tell us-

ans- the sea water temperature changes with time because the ration of isotopes incorporated into shells depend on temperature.

sea water temperature changes is affected all over marine life because there are several species which can survive only at the speific temperature .

2. the following statement characterize the recent behaviour of atmospheric CO2 . which is correct?

ans- CO2 gas is the greenhouse gas which leads to global warming . it is generated by the traffic pollution , industrial pollution and household pollution . CO2 has a capacity to store heat for a long time which makes it greenhouse gas . standard quantity of the CO2 in the atmosphere is the 0.04 % but due to pollution this figure is changing . carbon level was never same in the earth history, there was several time when CO2 level is quite higher like in phanerozoic. but this time its not natural although this change in the level of CO2 is comes only in the pas 30 to 50 years which is terrified.

so we can conclude that it is rising but not unusually so.  

3. which of the following is the main contributor to erosion in deserts?

ans - wind is the main erosional agent in the desert. there occur low rainfall whih prevents chemical weathering and there is no other agent which is effective in these conditions except wind . wind speed is higher in the desert and dryness of the wind it makes more effective erosional agent in the desert.

4 . which of the following statement about sea level is correct?

ans- becaus of global warming earth's temperature increasing continuously due to increase of greenhouse gases in the atmosphere. which leads to the melting of glaciers . this melt water goes to the sea and sea level has been increased.

according to some surveys sea level is rising by 1-2 mm per year as a result of melting major ice sheets.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.