More fizzing and foaming - making Witches Brew!!

What do you think would happen if you mix baking soda, dishwashing liquid and food colouring in a tall glass and then add vinegar!??
Can you remember which ingredient is the acid and which is the carbonate?

Some more things to think about:
What effect does the dishwashing liquid have on this experiment?
Does the shape and size of the glass effect the experiment?
What is the name of the gas that is made by mixing an acid and a carbonate?
To watch another cool fizzing experiment take a look at this great clip Mrs. Chao found!!

The Fizz Inflator!

This term we are investigating Temporary and Permanent Changes. We have been learning about solids, liquids and gases.
Last week we started looking at Chemical reactions, and what can make them. We looked at the 'fizz inflater' video on the Year 3-4 Science wiki.
Today, the children of Room 8 taught Miss. Collier how to conduct this experiment by giving her step by step instructions.

Photographer: Alex Brown Room 8
The experiment shows that an acid (vinegar) and a carbonate (baking soda) can make a gas (carbon dioxide) when mixed. It blows the balloon up.
After the experiment we discussed what would happen if...?
- there was more vinegar
- a bigger bottle
- we used a water balloon etc

This week Room 8 will be working in groups to modify (change) the experiement by changing the...
-amount of vinegar
-amount of baking soda
-size of bottle
-size of ballon
The children will need to predict what will happen (hypothesis) and plan (equipment, ingredients, method) before conducting their experiment. They will then need to observe (watch) and record their findings (results).
Keep checking the blog to view updates of our experiments!