7. What are sunspots and how are they formed? 8. Describe the sunspot cycle and

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7) sunspots are dark and cold areas on the surface of the sun, these spots were formed by removing energy from that very part of the sun. a powerful force ( force of magnetism) prevents light and energy from leaving sun's surface they can reach upto 50000 kms in diameter and are visible only when they are surrounded by the brighter areas around them.

the magnetic force is so strong that it actually stops the convective motion of hot inner material flowing to the surface and these sunspots can be even larger than the size of the earth.

8) number of sunspots appearing on the surface of the sun seems to fluctuate in quantity, sometimes we can see more sunspots while often we can very negligible amount of sunspots really visible, these rise and fall of sunspots year by year is known as sunspots cycle. generally the average cycle time is eleven years but it always vary.

when the sunspots appearing on the surface really in large number it is called as solar max ,while low count of sunspots is termed as solar min.

there is a correlation between temperature on the earth and sunspots activity. few sunspots results in increased temperature variability around the earth. there are also short term droughts that seemed to correlate with these sunspots. and people claim that the earth's global temperature is rising because of the increasing sunspots activity.

9) these are generally bright luminous clouds ,ionised gas which are erupted from the sun's surface also known as the sun's chromosphere these prominences has a reach of about few hundred to thousand of kilometres above the sun's chromosphere.

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