It is really easy to make your own indicators to show if a chemical is an acid, neutral or alkali. This experiment can be done without a Science lab, and can be adapted to be a sensory experience as well.
You will need:
beetroot, red cabbage and/or blackberries. Boiling water. A range of acids/alkalis to test.
To make the indicator, chop up your beetroot etc into small cubes. Add to boiling water and let stand until the colour has come out into the water. Remove the lumps, preferably by filtering (practice those practical skills) and let the coloured liquid cool.
You can then add this to a range of acids/alkalis and look for the colour change. These work best if they are colourless and can include:
acid – lemon juice, vinegar, lemonade
alkali – bicarbonate of soda, glass cleaner
To make this a more sensory experience, encourage students to smell each of the chemicals that are being used. They can taste the acids, before they add a bit of their indicator to observe the colour change.
You can make all three indicators and then compare results, which do students think is the best? Can they think of any applications for this?
Filed under School, Science
Recommend journal of emergent science (on ase website)
Looking at science in children’s story books. Focusing on science inaccuracies (many teachers will use these stories unaware of these) and focusing on why did that happen in a story line.
Why should we use fictional picture books to explore science at primary school ? Metaphorical language. Children blur imagination and reality.
? Link between teaching literature (interpret, debate) and improvement of understanding of science.
- Pictures need to be prominent
- Dialogue and conflict
- Consistent simple plot with proper logic
- Narrative problem linked to scientific problem
Use e.g. section of book to prompt discussion, raise misconceptions . Will link to what pupils already know
Children find it hard to put themselves in something/ someone else’s place to draw from their perspective
e.g. fish is fish . Tadpoles promise. Very hungry caterpillar. Seven blind mice. On the seesaw bridge
Can compare first and last double pages of each book
Royal society of chemistry funded a project to develop six experiments that are hands on and accessible to all. Based on exploring materials
Contains prep sheet, practical list, symbol worksheets
– each lesson delivered three times. Once as a new activity, then to develop skills, confidence and knowledge, consolidate
Use gloves for tactile defensive, cut holes in gloves in later sessions. Can also use Ziploc bags.
Will eventually be available free to download on national stem learning website