Explanation:
gravity if it's incorrect sorry
Answer:
The critical temperature of a substance is the temperature at and above which vapour of the substance cannot be liquefied, no matter how much pressure is applied.
Answer: Massive
Explanation: There are many galaxies out in the universe and it's possible they go on indefinitely. Out of all of these, our solar system is very very tiny. As an analogy, our universe would be like an atom which are the the smallest units of matter. There are many other galaxies that we just haven't been able to discover but they are there.
All the particles gain more energy and move quicker and therefore they spread out causing air to expand
They have less or more neutrons. Isotopes have same number of protons but different number of neutrons.
