Answer:meteorite- a rock that burns up in earth atmosphere
Meteor-the remains of rock from space that strikes Earth surface
Meteoroid-a small piece of rock in space
Explanation: I got it right on egunity
Answer: Protons
Explanation: Every atom is defined by its protons every element. So if it has 1 proton its hydrogen no matter what. If it has 2 protons its helium no matter what and so on. So if you know the number of protons you know the element.
The atomic number tells you the number of protons that are in the core of a particular element.
C. their skin
they have small areas where air can be taken in and released