C. the Spratly island and Taiwan claimed it
Answer: Its presence is a good determinant of past hot climates. Its absence can also indicate cold climates.
Explanation:
18O and 16O are oxygen Isotopes, and are used in determining past climates. Heavier than the 16O with 10 neutrons and 8 protons, the 18O does not evaporate as easily and because of this, higher amounts are found in the tropics.
Together, they serve as good determinants of past climate by checking for their ratio in fossils.
Also the 18O isotopes are not present in polar regions as they precipitate before getting to higher altitudes. Cold areas, on the other hand, are high in 16O as they get trapped in glaciers. When climate changes in a location, the quantity of both of these oxygen isotopes also changes.
Answer:
1) Fernando de la Rua, Argentina's president, resigned on December 20, 2001 after devaluing the peso and restricting withdrawals from banks.
2) As the vice-president had already resigned, the president of the Senate, Ramon Puerta, while Congress decided on the new president.
3) Congress decided to name Adolfo Rodriguez Saa as interim president.
4) He resigned on December 31, leaving the President of the Chamber of Deputies, Eduardo Camaño, as interim president.
5) On January 2nd, 2001, Eduardo Duhalde was named president by the Congress.
Explanation:
Ice was produced using radiation effect by setting out shallow terra cotta rays with just small amount of water. At night when the temperatures were cool while humidity is low the water used to freeze in the morning.the ice formed was collected and stored in caverns