Next up we decided to make a model of our cell city using different coloured play dough( I can’t believe I’m 38 and get to have so much fun!!):
And with labels:
We discussed the fact that an egg was a simple version of a single cell and that the yoke was the nucleus. We soaked two eggs in vinegar over 24 hrs, rinsed them and resoaked for another 24 hrs and rerinsed. I really need to take a course in photography!
This dissolved the solid egg shell, leaving behind the cell membrane, enclosed around the ‘cytoplasm’ (egg white) and the ‘nucleus’ (yolk). We talked about the membrane being semi permeable, letting only certain substances through the pores. We then placed one egg in pure water and the other in heavily salted water and hypothesised about the results.
We also did a bit of colouring in using this book:
I had also perused Amazon and came across some cell organelle slides. We had a screened microscope that we were blessed to find at a charity shop, so we used that to look at the slides:
I always, no matter what we study, beg steal or borrow (actually usually I just buy off Amazon!) lots of books to read for reinforcement. I think reading around a subject puts it in context of the bigger picture.
And just for a bit of fun and a taster of things to come I let them have a play with this set:
The very last thing we did was watch the bonus episode on the cell on my son’s ‘The Story of Science’ DVD: