please answer this!!!!!?

Question

Which of the following is among the things scientists predict for
Sun's demise?
The burning of helium will produce a carbon ash core.
The Sun will expand until it extends past the present orbit of Venus.
The sun will emit more energy but appear to be cool.
At different points in its final years, the Sun will become a red giant and a white dwarf.
All of the above are true.

Answer 1

The Sun's current age, determined using computer models of stellar evolution and nucleocosmochronology, is thought to be about 4.57 billion years.[4]

The Sun is about halfway through its main-sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than 4 million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation. The Sun will spend a total of approximately 10 billion years as a main sequence star.

The Sun does not have enough mass to explode as a supernova. Instead, in 4-5 billion years, it will enter a red giant phase, its outer layers expanding as the hydrogen fuel in the core is consumed and the core contracts and heats up. Helium fusion will begin when the core temperature reaches about 3×108 K. While it is likely that the expansion of the outer layers of the Sun will reach the current position of Earth's orbit, recent research suggests that mass lost from the Sun earlier in its red giant phase will cause the Earth's orbit to move further out, preventing it from being engulfed. However, Earth's water and most of the atmosphere will be boiled away.

Following the red giant phase, intense thermal pulsations will cause the Sun to throw off its outer layers, forming a planetary nebula. The only object that remains after the outer layers are ejected is the extremely hot stellar core, which will slowly cool and fade as a white dwarf over many billions of years. This stellar evolution scenario is typical of low- to medium-mass stars.[5][6]

Answer 2

I will say D.

No carbon ash core.
The sun will become a red giant and expand beyond Mars.
The sun will cool ( in a sense ) but as it burns off its fuel the gravitation effects will weaken and it will expand. It will become a white dwarf and then die.

Answer 3

"at different points in its final years, the sun will become a red giant and a white dwarf"

the sun is too small for carbon to be produced. so that rules out the first one.
the sun will expand, due to the fact that once its" nuclear fusion fuel" has ran out, the force of gravity is reduced, thus the outer core will likely move out or spread out. to what extent, im not too sure.

Answer 4

At different points in its final years, the Sun will become a red giant and a white dwarf.

it is certainly the right answer. damn sure

Answer 5

the last but one is fully true.
the first and the third one's are inaccurate.
so, the last one can't be right
the second is also inaccurate because the red giant will go further the earth, not just venus

Answer 6

The last one. I'm dead serious, I don't remember much from grade 8 science but I remembered that. The second one is also true but it will go out to Earth, so I think it's wrong.

Answer 7

I think the outer layers become ash ? W hat about super nova .

Answer 8

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Answer 9

Is this a question or you are educating us on the sun and the expectations?

Answer 10

sun is producing heat and light because nuclear fusion is occuring there.