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11 years

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Q: Sun spots increase and decrease on a cycle of how many years?
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What is is the sunspot cycle?

http://en.wikipedia.org/wiki/Sunspot_cycle The definition for sunspot cycle is "the recurring increase and decrease in the number of sunspots over a period averaging about eleven years."


When you look at the sun what are those little circles called?

I hope you are observing the sun safely! They are the sun spots you've heard about. They increase and decrease in number, over a cycle of about 11 years. Apparently there is a connecton between sunspots and the condition of the sun's magnetic field.


Will the amount of hydrogen and helium in the sun increase or decrease over the next few million years?

The amount of hydrogen will decrease and the amount of helium will increase.


Will amount of hydrogen and helium in the sun increase or decrease over the next few million years?

The amount of hydrogen will decrease and the amount of helium will increase.


Does the total amount of oxygen atoms on the earth increase or decrease over time?

increase by 45 years


Is Sarcoma Cancer on the increase or on the decrease throughout the previous years?

sarcomas increasing


Is this years cost an increase or decrease on Super Bowl commercial?

Increased, greatly.


Did the Muslim population increase or decrease over the past years?

The Muslim population has INCREASED.


What changes in 11-year cycles?

Solar flares and sun spots cycle every 11 years. i.e. Every 11 years solar flares are at a maximum before repeating the cycle.


Will the amount of hydrogen and helium in the sun increases or decrease over the next few million years?

The amount of hydrogen will decrease and the amount of helium will increase.


What does the census bureau estimate will happen to the number of older people?

The answer to this one is it will increase dramatically.8)


Are leprosy cases on the increase or decrease worldwide?

lower, we actually found a cure some 100 years ago