Hello there Jonnromeroo, thank you for asking a question here on Brainly!
You Asked ➤ Which of the following processes begins when a star enters the main sequence?
↴ OUR CHOICES ↴
A: Nuclear fission
B: Nuclear fusion
C: Condensation of a nebula
D: Appearance of a supernova
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Answer ➤ B: Nuclear fusion
Explanation: When a star begins the process of being created, it is hot and dense. Really hot and dense! It begins to start fusing with helium which is the start of its main sequence called nuclear fusion.
I hope this answer is helpful to you, but please let me know if you have any other questions regarding it.
<em>- Qamar </em>
Answer: I'm pretty sure this is true
Explanation:
Answer:
1. Greenhouse gases trap heat in the atmosphere warming the Earth’s temperature above freezing. This is known as the Greenhouse effect.
2.. The three greenhouse gases that are of most concern are Carbon Dioxide (CO2), Nitrous Oxide
(N2O), and Methane (CH4).
3.Without some greenhouse gases and the Greenhouse Effect, Earth’s temperature would be close to -18°C.
Explanation:
Answer: a
Explanation:
the length of a cobra doesn't help with the study of life. The moon doesn't either because there is no life on the moon. And how fast the earth rotates is more of a earth science question. I hope this somewhat helps
