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This test is run by .
Note that your final mark will not be saved in the system.

Stars Reorder

Target Level
C
Running Total
0
0%
Attempt
1 of 3

Drag and drop the boxes into the correct order.



  • The outer layers of the star are thrown off, and may provide the material for another star.
  • The remaining core collapses in on itself, becoming dense enough to form a black hole.
  • Hydrogen in the star's core is all fused, and the star briefly contracts, becoming hot enough to fuse helium. The outer layers of the star expand.
  • Dense pockets of gas and dust attract each other gravitationally
  • The star is now in its main sequence
  • The star collapses in on itself. The brief period of higher pressures trigger fusion of elements heavier than iron. This is a supernova.
  • A nebula consists of gas and dust
  • Eventually the gravitational pressure at the centre is high enough to fuse hydrogen
  • Eventually all fuel for fusion runs out.

This is your 1st attempt! The marking algorithm gives more marks for getting the right order first time.

Pass Mark
70%