To skyrocket is to go from being very low in popularity to becoming very popular very quickly. When a new product or idea starts to skyrocket in popularity, it quickly becomes the most popular thing in the world.
An underdog is a team or person that is expected to lose, but in fact ends up winning. This is usually because the underdog is very talented, or because the other team is not playing their best.
When something is shockingly bad, it is so much worse than you expected. When you are shocked, you are not able to react in a normal way.
To heat something is to make it warm. You can heat something up by using heat or by putting it in a warm environment.
Fission is the process of a substance (usually an atom) splitting into two parts. This can happen when the atom is hit by an ion or when it is in a hot environment.
Neutrons are the tiny particles that make up atoms. They are very important because they are the atoms' nucleus.
When you are bombarded, you are hit with a lot of things or ideas at once. This can be a very overwhelming experience, and it can lead to confusion and chaos.
To spark something is to start it up. When you light a match, you spark the fire.
To stagnate is to stop growing or to stop improving. When the economy stagnates, the number of jobs and the amount of money in the economy stay the same.