| 1. | The four activity periods are electives, allowing campers to customize their experience.
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| 2. | Several times each week, special events take place during the evening activity period.
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| 3. | The activity period is the last session on Wednesday afternoon.
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| 4. | An effective way to pry work-obsessed nerds from their keyboards during MIT's annual Independent Activities Period?
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| 5. | Still, this is the hurricane season's peak activity period, which runs from late August through early September.
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| 6. | Also, this is the hurricane season's peak activity period, which runs from late August through early September.
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| 7. | The activity period is June August.
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| 8. | Most activity periods are triggered by workers returning from foraging to the nest with material for the colony.
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| 9. | The bat feeds during short activity periods in the evening and dawn, foraging around nearby forest areas for insects.
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| 10. | The mission was one of the most complex performed up until that date, involving five long extra-vehicular activity periods.
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