C. numbers of neutrons.
Compared to atoms of the same element, isotopes have differentnumbers of neutrons. They are variation of the same element. Often isotopes are radioactive, as they are not stable element, and they have various uses: for example, the isotope of the Carbonium with 14 neutrons - C14 - is used to calculate the date of certain ancient objects.
Answer:
ice age
Explanation:
Definition: a glacial episode during a past geological period
The answer would be: The rock cooled quickly.
These types of igneous rocks are called extrusive rocks. These are igneous rocks that cooled on the surface. They form only small crystals because they cool quickly at the surface. Intrusive rocks are its counterpart, they form bigger crystals because they form underground and slowly allowing time for bigger crystals to form.
Most severe weather is generated in areas that are warm and moist .