The main reason is that there is no atmosphere. This means that there is no weather and no weather means that there is no wind or rain. Wind and rain are main components of erosion and because there is no erosion, craters can stay preserved for a very long time.
Hope this helps!!
An isotope of any element is the same, with a variation in the neutrons of the nucleus.
The mass number change but the atomic number doesn't.
In this case, protium, deuterium, and tritium are all hydrogen isotopes.
Protium is 1H or Hydrogen-1 is without neutrons.
Deuterium is 2H or Hydrogen-2 has one neutron.
Tritium is 3H or Hydrogen-3 has two neutrons.
Answer:
NUMBER ONE: a) a metal pan b)cover/blanket
Explanation:
a) it retains heat because when its heated, it heats fast, if cooled it cools fast
b) a blanket/cover actually contains heat thats how it gets you warm it traps the heat that enters it and keeps it heated.
