<u>Answer:</u>
The astronomers predicted fireworks from the rare stellar encounter in the year 2018. Stellar collision can be defined as when two stars which are in the same group of the stars due to the radiations emitted by the gravity or may be because of some other reason.
The importance of this encounter to the astronomers was that this can describe the huge population of millisecond pulsars and can also be used to develop the exotica of the stars.
the process by which Earth makes heat is called radioactive decay. it involves the disintegration of natural radioactive elements inside Earth. ex; uranium is a special kind of element because when it decays, heat is produced from it
Answer:
I don't understand your question may be questioned mistakes
The continental crust is made up of rocks that consist primarily of silica and alumina called the "sial". The next layer of the Earth is called the mantle.
I think it is D if i remember middle school that well
