| 1. | It has a Sun-like activity cycle that has been decreasing in magnitude.
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| 2. | Everyone's in different time zones, and has different work commitments and activity cycles.
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| 3. | The activity cycle for this star is 11.1 years in length.
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| 4. | The cycle is controlled by the human REM and the delta activity cycle.
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| 5. | It may also have a secondary activity cycle of 9.6 years.
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| 6. | Their daily activity cycles are controlled by environmental light levels.
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| 7. | The sun by comparison has an 11-year magnetic activity cycle.
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| 8. | Festivities and social activities can cause us to deviate from our normal activity cycle.
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| 9. | Like the Sun, it has a magnetic activity cycle.
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| 10. | Most volcanoes reach a peak relatively early in their activity cycles and then gradually decline.
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