The two events that occur when gravity causes a nebula to collapse into itself are:
A. Nuclear fusion start.
B. A new star forms.
Explanation:
- Nebula are giant clouds of dust and gases.
- These clouds are considered as progenitors of stars and planets.
- The gravitational pull within these giant clouds result these large masses to collapse towards their centre.
- The gravitational collapse results in tremendous rise in temperature till a point where nuclear fusion begin .
- The stars are born out of such mechanism and act as a source of heat and light in universe.
I think the answer is C) R I had this question and that was right for me hope this helps!
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Absolute Dating
AKA. RADIOMETRIC DATING
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Absolute Dating
Involves finding the absolute age (actual age) of a rock or fossil.
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As radioactive elements emit particles and energy, they form new isotopes or elements.
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In a stream, the predators of a certain organism will help keep populations checked. Moreover, the limited resources, such as space and food, will keep the population from growing out of control.