Uranium-238 has a half-life of 4.5 billion years. given that scientists estimate earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on earth? a. 10 percent b. 25 percent c. 50 percent d. 75 percent

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Which suspect most likely committed the robbery and how do you know