In science today (2/3/14), we kick started the lesson by doing a demo of how does temperature affect the amount of salt that water can hold. The demo was simple. We took 100ml of room temperature water and 100ml of boiling water, and then we added salt. On the room temperature water, we put only 7g and the water was already completely saturated, but in the boiling water, we put 27g of salt and it only just started to saturate, from which we learned that the higher the temperature of the water, the more salt it can hold.
Next, we went back to our tables and looked at a picture that had a well, ocean, highway, landfill, layers of dirt, a septic field, and the aquifer. Our task was to try and find what could be some potential problems for the well and the aquifer. I thought that everything o the picture was a potential risk. The highway runoff contains rubber and oil, and then soaks into the ground goes to the aquifers. The landfill runoff is just nasty and also soaks into the aquifers. If the use the aquifer water too fast, the ocean water will substitute the fresh water, making the well water salty undrinkable. The septic field is where sewage goes and it may contaminate the well water, spreading disease.
After we discussed all these problems, Mr. Pro told us do go to the science blog and complete the groundwater form that he created. After a while, he asked us to submit our responses so we could review them.
Later, close to the end the lesson, we watched a video about these Tubu women who know how to find a well of water that is only 1m2 in the middle of the Sahara desert! It was really amazing how they could navigate themselves through the barren landscape using the dunes and it mystifies me how they do it even though they explained it in the video. Overall, this was a pretty fun lesson, and we probably learned a few pretty cool things that we didn't know about water today.