Answer:
C) when nuclear fusion begins in the core
Explanation:
- <u>The protostar is a main-sequence star that has a core temperature that exceeds abut 10 million K and is needed for the hydrogen to operate efficiently and the </u><u>length </u><u>of this process depends on nature and the stellar </u><u>mass</u><u>, as the huge massive star have a greater and bigger core and fusion takes fast.
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- A protostar is also called as primitive star and represents the earliest phases of the process of the stellar evolution and takes place after it leaves form the main sequence star.
Answer:
As the water vapor rises up in the air, it condenses, or starts to cool down and turns back into a liquid. Then, droplets of water start to stick together as clouds. When water drops fall from clouds, it is called rain. Sometimes the droplets freeze before they get to the ground and become hail, sleet, or snow
Explanation:
Halite and sulfur are the two minerals that you can taste and identify. Halite has a salty taste on it and Sulfur has a rotten egg taste. I would rather taste Halite more than Sulfur.
Answer:
The most widespread direct risk to human settlements from climate change is flooding and landslides. Projected increases in rainfall intensity and, in coastal areas, sea-level rise will be the culprits. Cities on rivers and coasts are particularly at risk.
Explanation:
Jupiter, Uranus, Neptune, and Mars.
