You take a sample of rock and find that, out of 1 atoms, it contains 5000 atoms of lead 206, the daughter isotope of uranium 238. based on this you can infer that the original number of uranium atoms was 1.

(true or false)

explain the reasoning

The continental divide a divides the united states into east and west b. divides the united states into north and south c. divides the flow of river systems in the united states into east and west d. is a series of rivers and mountains that separates canada from the united states select the best answer from the choices provided.

Asimilarity between the governments of israel and iran is that a both are considered democracies b. both are ruled by a prime minister c. both give men and women voting rights d. neither allows political parties to exist

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?