As part of our work with plants and growing this term, Class One have been fascinated by the effect of different liquids on flowers.
They were very eager to design their own experiment around this.
First we came up with different liquids we could test – our list included hot water, fizzy water, cola, washing up liquid, paint, milk and food colourings.
Then we thought about a fair test. The year 2s suggested that we needed to use the same amount of each liquid and that the flowers all needed to be in the same place in the classroom.
We also kept one in normal water as a control flower to compare them to.
These are our observations.
Normal Tap Water – some flowers and white
“It’s alive and it has opened up!”
Cola – Some flowers and white
“I thought it would go brown because coke is brown but it hasn’t.”
“It is alive and has opened up a bit – I think coke has water in it!”
Washing Up Liquid – No flowers, sepals have turned yellow
“I think it’s dead” “I wouldn’t use that!”
Red Food Colouring – Some flowers, Pink
“It’s alive and very pretty!”
“It’s soaked up all the colour and the leaves (sepals) have gone red as well!”
Blue and Red Food Colouring – No flowers but not dead, a mix of colours.
“Some bits are blue and some bits are red and some bits are black.”
“Maybe different bits like different colours”
Fizzy water – Some flowers, white
“It’s water so it’s good for the flower.”
“I wouldn’t use it for flowers cos it costs money. Normal water is free.”
Hot water – started to open up, yellow flowers
“It’s dying – it’s gone all yellow”
Overall we thought that tap water was probably best for the flower but food colouring made for very attractive flowers.