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.
menyebabkan tumpahan minyak, hidupan laut terjejas, dan lain-lain
Answer:
Climatologically, the tropics are characterized by high year-round temperatures and weather is controlled by equatorial and tropical air masses. ... The temperate region also has many different climate regions with warmer and cooler temperatures and seasonal rainfall.
<span>There are two. They are called the Coastal Plains and the Great Plains.</span>
