What is the universe and what is it made from?

Science

Every part of space seemed to have some heat in it as if there was an explosion that happened a lot time ago and the heat was left over.

Galaxies seemed to be getting further and further away and therefore the universe must be expanding.

Scientists heard an extremely loud noise in our universe which led them to believe there was an explosion.

Which of these is NOT one of the discoveries that led to the creation of the Big Bang Theory?

... a galaxy exploded and created all other galaxies, thus forming the universe.

... all matter that ever existed began in a single point that suddenly exploded outwards.

... our universe is expanding because there will be an explosion in the future.

When stars are formed, gravity pulls what two things together?

Initially, a star uses which of these to keep shining and giving light?

After it runs out of that element, a star becomes bigger and changes colour to...

Dwarf stars are much smaller and do not burn as brightly. Which of these colours can they NOT be?