elementary school science

Real World Application: Drain Cleaners - Should I use them?

Common drain cleaners consist of water, sodium hypochlorite (bleach) and sodium hydroxide (base) and/or potassium hydroxide (base). Bases are caustic (caustic loosely means to gnaw or eat away at) and can cause corrosion in metal pipes. Wouldn’t you know, our house has PVC piping through the fixtures that dump into a 45 year old cast iron pipe. The cast iron pipe is old and currently shows signs of surface rust and corrosion to the point where the pipe appears to be leaking then sealing itself in several spots. Not to mention the interior of the cast iron pipe may not be completely open, thus, not permitting a fast flow in drainage. Good news: a home warranty is being taken advantage of to hopefully replace the cast iron pipe with a PVC pipe.

 

The Gas Laws Are Out of This World!

A few years ago, we launched a weather balloon during our summer science camp. The balloon reached an altitude of 30 km (100,000 ft)! Among other things, this project ended up being a great way to teach campers about the gas laws and how atmospheric pressure decreases with altitude. 

Chemistry Summer Camp - An Overview

Oh summertime! My non-teacher friends and neighbors like to point out that it must be great having summers off from work. I try to explain that I’m still working although it’s really nice having a break from the students. And I know that a lot of colleagues in my PLN on Twitter are enjoying their break from students too while still spending some time working on upcoming challenges and curriculum designs.