Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
Answer:
Hi again! Here are my notes on Italy from my geography class last year:
<em>Geography of Italy</em>
Italy is a boot-shaped country to the south of the nations of France, Austria, Slovenia, and Switzerland. Sharing a Mediterranean culture with the Greeks, the Romans built on and borrowed from the Greek advances in civilization. Rome was the capital of what would become a far-reaching empire that would spread these ideas around the known world 1500-2000 years ago. Ideas like trial by jury, judges, plaintiffs, and defendants in court systems came from Rome. Engineering of architecture, roads, aqueducts, Roman baths, and the formation of the Catholic religion all came from the Roman culture. Art, music, literature, and the sciences were all made more sound by the Renaissance, which started in Rome and influenced the world. Along with Greece, Italy is part of the European Union, and its economy is based on textiles and industrial products.
