What is the most common element in the universe? (Hint: Big Bang)

The heat generated through nuclear fusion in a star’s core exerts an outward force on the material around it. This would cause the star to expand, but it is balanced by another force acting upon the material in the star, which keeps it stable. What is the other force acting on the matter in the star?

What process is the source of energy in main sequence stars?

Which element do main sequence stars primarily use for nuclear fusion?

Once the hydrogen in the core of a star runs out, what element does the star begin to fuse next?

Nuclear fusion only happens in the _______ of a star, where the _____ and ______ are high enough to allow nuclear fusion to occur.

Once the hydrogen and the helium in the core of a star runs out, what element does the star begin to fuse next?

Which two of the following elements are not formed in a main sequence star?

Carbon

Plutonium

Iron

Oxygen

Francium

Which of the following elements can only be formed in a supernova?