if you aren't paying attention, you don't know when it ran out
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∙ 12y agoThe hourglass dolphin is called an hourglass dolphin because its black and white markings resemble an hourglass!
Some disadvantages of a sand clock (hourglass) include limited time measurement accuracy due to variations in sand quantity or flow rate, susceptibility to damage or breakage if dropped, and difficulty in reading the time precisely if the sand is not evenly distributed.
An hourglass was used as a timer, with the size of the hourglass determining the length of time it measured.
phantom hourglass is released in 2007.
glass+sand=hourglass
glass+sand=hourglass
sand + glass = hourglass
How many seconds are in a hourglass
you get the little ball thing tap on the hourglass and draw a hourglass
sand+ glass =one hourglass
Hourglass of Summer was created in 2002.
Hourglass triplefin was created in 1876.