What is slack water?
AnswerThe period when a tidal current is weakest
Slack water occurs near the turn of the tide.
Outdoors · Facts & stats
Slack facts & stats
7 fact-checked facts about slack water, slacklines and the science of slack, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which body mainly causes Earth's ocean tides?
AnswerThe Moon
The Moon's gravity is the main driver of tides.
Going deeper
Slacklining grew from rock climbers in which national park?
AnswerYosemite
Climbers in Yosemite popularized slacklining around 1980.
How many high tides do most coasts get per day?
AnswerTwo
Most coasts have two high and two low tides a day.
Who walked a wire between the Twin Towers in 1974?
AnswerPhilippe Petit
Philippe Petit crossed between the towers in August 1974.
Expert level
What is the Hawaiian name for slack key guitar?
AnswerKi ho'alu
Ki ho'alu means loosen the key.
Spring tides happen at which moon phases?
AnswerNew and full moon
Sun and Moon align at new and full moon, making bigger tides.
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