Tuesday, 9 May 2017

Animals and change

This week we are looking at animals and the different types of camouflage - blending in with colour, pattern, disguise, or mimicry. 

We will be thinking about why and how animals camouflage and will find out about some animals and their amazing ability to change.

Take a look at this video of cuttlefish - they are really extraordinary! 

We will also be looking at Metamorphosis in animals this week and next as part of our concept of change.



Last week we had fun looking at change with chemistry. Here is a simple but interesting experiment you might like to try at home.  
Year Two children experimenting by blowing into the solution.
Year 3&4 children observing reactions.





INDICATOR BLUE EXPERIMENT
Purple Cabbage
Hot tap water

Slice some cabbage into a large bowl and cover with hot tap water. Leave for 5-10 mins, then strain and keep liquid. This is your indicator solution (it changes colour to indicate pH) - it will be blue or purple, depending on how long you leave it and the temp of the water etc -it will work regardless of the colour it starts as. 

Now you can pour some of the solution into several glasses or any clear containers. Experiment with adding different substances to find if they are acidic or alkali. Acidic things around the home are generally sour things - vinegar, lemon juice, lime juice, citric acid etc. They will turn the solution pink. Alkali things are generally soapy - like washing powder, soap, baking soda - they will turn the solution green or blue tones. Don't forget to keep a 'control' so that you can see what colour the solution started as. Kids will have lots of fun with this. Remind them that mixing some solutions from opposite ends of the pH scale could cause a reaction - eg baking soda and vinegar - but they will want to experiment with changing the colour and trying to neutralise the pH again (getting back to the original colour).

Year 2 children - look at the colours we made!

Scratch Club - first week Term 2 2017
Many children had ideas for what they would like to test at home - shampoo, lemonade, dishwashing liquid, hand sanitiser, sugar, juice etc etc. Great fun for engaging them in science, and also getting them to observe and predict.

You can also try blowing through a straw into the cabbage water solution. You will notice the solution turns pinkish - you have made a weak acid. CO2 (that you breathe out) and H2O (water) = H2CO3 (carbonic acid).







SCRATCH CLUB
Some of our year 6 boys are running a 'Scratch Club' at lunchtimes on Wednesdays in B9. Scratch is a free computer programming website - children can design their own games, characters etc. Flynn and Ajay are running this class. I am so impressed with their ideas and teaching ability - they coped so well with over 40 students who turned up last week!
Well done boys - I am impressed by your enthusiasm and willingness to share your knowledge with others. 

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