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Answer: Supernova Explosion </h2>
A star exists due to the balance between two forces:
1. The gravity force that tries to squeeze the stellar material into the smallest and most compact ball possible.
2. The nuclear force, generating heat and pressure in the center of the star that tries to push all the material out.
Now, when the star has occupied all its nuclear fuel, the expansive pressure can no longer counteract gravity and the star suddenly collapses.
When this happens, a supernova is formed, which causes the expulsion of the outer layers of the star by means of powerful shock waves, enriching the space that surrounds it with heavy elements.
So, it can be said that a supernova is the bright, last breath of a star that is at least five times more massive than the Sun.
Answer:
which sedimentary rock would be formed by the compaction and cementation of rounded pebbles?
Conglomerate
Conglomerate is a clastic sedimentary rock that forms the cementing of rounded cobble and pebble sized rock fragments.
Explanation:
Answer:
Hydroelectricity
Explanation:
Hydroelectricity amounts to 59.3% of Canada's power production, making it the primary energy source.
Bonus fact: Canada is the second largest hydroelectricity producer in the world! (Only after China)
You may want to check your question again or your choices. The moon of Jupiter that NASA announced that may be capable of sustaining life is Europa, which is not in your choices.
In your choices though there is a moon that has a potential of sustaining life which is C. Enceladus but it is Saturn's moon, not Jupiter's.