Thursday, June 28, 2012

Experiment: Determing Salinity of Various liquid Samples

Today the students were asked to hypothesize which sample is the densest, the least dense, and the ones in between.  

Using four different color coated samples the students conducted 4 tests commonly used by scientist.
  • Wooden Pencil Floatation Test
  • Glass Hydrometer Test
  • Plastic Hydrometer Test
  • Refractometer Test 




Color coated water samples

Plastic Hydrometer Test

The floating pencil test

recording data

students used a graduated cylinder for measurements









student looks into refractometer