Monday, 05 May 2014 14:33
A1-22: HOURGLASS
Additional Info
- ID Code: A1-22
- Purpose: Show an hourglass
-
Description:
An hourglass was an early means of time measurement. The picture above shows our elementary version of the hourglass; many historical designs were more sophisticated and thereby able to time such diverse events as boiling an egg or measuring a one hour interval.
This is primarily useful for introducing the concept of mesaurable time units, not for actually making measurements.
- Availability: Available
- References: REFERENCES: (PIRA unknown.)
- Loc codes: A2
Published in
A1 Basic Materials and Measurement
Tagged under
-
A1-01 MASSES - KILOGRAM AND POUND
Compare the weights of one kilogram (SI unit of mass) to one pound (English system unit of force) Read More
-
A1-02: MASSES - CHROME PLATED
Show a collection of calibrated masses Read More
-
A1-03: DENSITY - VARIOUS BRICKS
Demonstrate the concept of density Read More
-
A1-11 LENGTHS - METER AND YARD
Compare the length of one meter (SI unit) to that of one yard (English unit) Read More
-
A1-12: METRIC TAPE
Make measurements in the metric system Read More
-
A1-21: METRONOME
Means to show different intervals of time Read More
-
A1-22: HOURGLASS
Means to show different intervals of time Read More
-
A1-31: VOLUME MEASURE DEMONSTRATION
Illustrate metric volume units Read More
-
A1-32: VOLUMES - SPHERICAL VS CYLINDRICAL
Illustrate a volume perception paradox Read More
-
A1-41: DRAWING PUZZLE - INTERSECTING RODS
Visualize three-dimensional figures Read More
-
A1-42: DRAWING PUZZLE - HALF CUBE
Visualize three-dimensional figures Read More
-
A1-43: CROSSING RODS
Visualize three-dimensional figures Read More
-
A1-51: SKATEBOARD
Show things with a skateboard Read More
- 1