please answer this?

Question

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

Answer 1

ad 1. the burning of helium will produce lithium and so on untill it requires more initial energy to overcome as the sun produces - models predict that the process of producing more and more heavier elements should stop somewhere around Carbon

ad 2. the radius of the sun will expand about 50-100 times which would be (sun's dia: 1.4million km,venus sun distance 108million km) so it's possible

ad 3. the sun will have a bigger surface area to emit but at the same time hasn't got enough energy to remain as yellow as it is now - it'll become red - that's why it's called a red giant.

ad 4. after being there as a red giant it'll loose the outer shell and collapse back into a white dwarf


so.... point 5 is true, although a more details wouldn't hurt to confirm/cancel out points

Answer 2

2

Answer 3

5. All of the above.

Could give you a lot more interesting info, but this is obviously a homework assignment and I'll give you one freebie a month. Good luck.

Answer 4

#5 This is because all scientists have their own theory. Some agree with each other.

Answer 5

5. All of the above are true.

Answer 6

the fourth point.