The correct answer for the question that is being presented above is this one:
(1) contracting cloud of gas and dust
(2) protostar
(3) main-sequence O star
(4) red supergiant
(5) supernova
<span>(6) neutron star</span>
Here are the following items to be arranged:
<span>- protostar
- supernova
- contracting cloud of gas and dust
- main-sequence O star
- red supergiant
- neutron star</span>
It has gone through four half-lives of carbon-14 (5730 years<span> x 4 = </span>22920 years<span>)
It is 22920 years old.
Hope this helps!</span>
How does the Earth create a magnetic field?
The Earth’s magnetic field is created by the rotation of the Earth and Earth's core. It shields the Earth against harmful particles in space. The field is unstable and has changed often in the history of the Earth.
I think the answer is "State", you probably should quote me on this though...
