Sunday, November 15, 2009

Introduction To Liquid Measurement

What Is The Impotance of Measuring Volume of Liquid ?
Let us ponder on the story below :


Archimedes needed to determine if a goldsmith had embezzled gold during the manufacture of the royal crown for King Hiero I of Syracuse. How would you find out if a crown was made of gold or a cheaper alloy? How would you know if the crown was a base metal with a golden exterior? Gold is a very heavy metal (even heavier than lead, though lead has a higher atomic weight), so one way to test the crown would be to determine its density (mass per unit volume). Archimedes could use scales to find the mass of the crown, but how would he find the volume? Melting the crown down to cast it into a cube or sphere would make for an easy calculation and an angry king. After pondering the problem, it occurred to Archimedes that he could calculate volume based on how much water the crown displaced. Technically, he didn't even need to weigh the crown, if he had access to the royal treasury, since he could just compare the displacement of water by the crown with displacement of water by an equal volume of the gold the smith was given to use. According to the story, once Archimedes hit upon the solution to his problem, he burst outside, naked, and ran through the streets yelling, "Eureka! Eureka!"

Worksheet (reading measurement)

Standard measuring instruments






non standard measuring intruments





worksheet

Tuesday, November 3, 2009

Comparing Volume Of Liquid

To Compare Volume Of Liquid :

you need two different shape of containers, and two measuring cylinders.





1. Pour the liquid in container 1 into the first measuring cylinder.
2. Read aloud the measurement on the first measuring cylinder.
3. Next, pour the liquid in container 2 into the second measuring cylinder.
4. Read aloud the measurement on the second measuring cylinder.
5. From the two reading, which container has more liquid ?

Measuring Volume Of Liquid

To measure volume of liquid :

you need 2 pails and a measuring cup (500ml)



1. Fill a pail with water.
2. Using a measuring cup, scoop the water from pail 1 to pail 2.
3. As you pour the water into pail 2, say aloud 500ml.
4. Scoop another cup of water and pour into pail 2.
5. Say aloud 1000ml as you pour the second cup of water into pail 2.
6. Repeat the process and say aloud 1500ml, 2000ml, ... till all the water in pail 1 has been poured into pail 2.
7. Now you know the volume of of liquid in pail 1.