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Keep the camera rolling

After making a number of videos with Matthew I have noticed that the best stuff often happens once my planned experiment is over. Normally this is once I've stopped filming and have started cleaning up. This is the time when Matthew really starts to investigate things by himself. I am now careful not to stop the 'experiment' too early.  Its fascinating the things that he picks up. I've noticed a similar thing happening when I do science shows.  While I'm packing up a few kids come up and starts really looking, touching and learning. Recently I intentionally took advantage of this and after the main 'show' I set up some workstations where the students got to carry out the experiments by themselves. This definitely was the highlight and the students absolutely loved the chance to experience the science hands on by themselves. I'm keen to keep thinking about ways to encourage hands on exploring of science. Would love to hear any ideas you may have.
Recent posts

pH in the kitchen

We extended our learning about acids and bases to the pH scale. I intentionally did not over edit the video video because it really shows the learning process so the video is longer than normal. By the end of the video Matthew was better at matching the pH paper against the pH chart than I was. Matthew also introduced the video with out any prompting from me - he's picking it up quickly. Again using the A, B and N tabs really seems to have helped provide a framework for learning. Make sure you watch till the end. Matthew spontaneously started writing down all that we had been going through. It was almost like he was writing up his lab book. I could learn some lessons from him!!

Dry ice and pH

I have to admit that the colour change was not a pronounced as I was hoping for with carbon dioxide dissolving to form carbonic acid. In the past I have used other pH indicators which give a much bigger colour change. This is due to the relative high pKa of carbonic acid ~ 6 in contrast to acetic acid in vinegar (pKa ~ 4). I’m keen to repeat this using a different indicator and possibly just blowing into a solution using exhaled carbon dioxide to change the pH. This is a very important demonstration as it simply shows the effect that our carbon dioxide emissions have on the pH of the ocean. Acidification of the oceans is a topic that has not really been raised in the climate change debate but a very serious problem that is looming...

Bubbles

We now tested what happens when you mix acids and bases. What I really like about this video is that you can see that some of the concepts have been sinking in. In particular Matthew has learnt how to use the colour chart and is testing his own ideas like what happens if we add more.

Learning about acids and bases

The first time we tried to make this video I did not have the colour standards in the backgroud. Matthew really didn't get the concept. After discussion with a more experienced science educator (my wife) I change the way we ran the experiment and used the colour standards. They definately helped get the point across. Testing soda water really was a spur of the moment idea and definately got us thinking about where it fitted into our colour scale - make sure you watch to the end to see this. If you would like to see our first attempt - here it is. Sorry about the lower quality. It is really interesting to see how much more Matthew was able to understand through using the colour standards. In our first take when I asked him why things were happening he kept coming back to “they are made of chemicals”.

Learning about chemistry with purple cabbage

We started a series of video looking at acids and bases. Fittingly we used purple cabbage as our pH indicator. What I love about the first video is that Matthew eats the cabbage during it - this really highlights the important point that everything is made up of chemicals (currently a very 'dirty' word).

What a candle needs to burn

Here is our second video and the first under the title of "Khemistry kid" It was really interesting to Matthew start to think about why we can't fill the glass up and how that relates to how much oxygen is in the air. I have also noticed that he still remembers what combustion is a few months later....