Wednesday, 23 October 2013

Dry Ice Does not Mean it is Warm!

Lesson Plan:




























Today we looked at which one is denser, the oil or the blue liquid or the green liquid. And we saw that the oil was less dense than the blue liquid and green liquid. So the layers stood as on the bottom the blue liquid, on the middle the green liquid and at the top it stayed the oil.



Then we looked at images from the Mouth of the Amazon to see the density of the water, so when the salt water mixes with fresh water it becomes brine.




We tried to bring part of the tank water to the jar. It worked because the air pressure pushes the water into the tube. 


Then we did a form that was separated in different parts:

We had to write the description for mass and volume: 









We had to write the unit for volume and the unit for mass:










Then we had to write the units for the mass for each of the objects cited:













Then we had to write down different measuring devices for mass and volume:








Then we had to put the mass and the volume for the following objects:


























Then we had to put the density of the objects and finally compare the predictions:





Then at last we say which is more dense, which is less dense and which one is the one that sinks faster on water:



Then we talked about the answer that people did on the form:






Mr. Pro told us for us to bookmark the science blog: http://sci7graded.blogspot.com.br/


We talked about the experiment of dry ice, Mr.Pro gave us piece of dry ice, but you can't touch it for a long time, because you can get burned, in other words the water kills the cells around your finger so it causes it to hurt. The dry ice is a very cold piece of ice.


The procedure students took was this:



Students wrote down observations and qualitative observations:




Lastly we threw our dry ice in the container which created the steam that is used as special effects:

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