Laguna’s Lessons

This week we are working on learning metric measurement.  Why does it matter how we measure?  Well, it wasn’t until someone began making very precise measurements that scientists learned about the conservation of mass in a chemical reaction.  Antoine Lavoisier was able to measure the oxygen gas produced in Joseph Priestly’s famous experiment and revealed an important secret of chemistry – matter isn’t created or destroyed in a chemical reaction…it simply changes from one form into another.  You may be surprised to find out that when we make precise measurements as part of our observations some very interesting questions can arise!  One lab group saw today that 50 mL of one liquid added to 50 mL of another liquid resulted in a total volume of only 98 mL.  If you have an inference about these observations you can share it by commenting on our blog!