Science – How plants use water
Mrs Papillo brought in some carnation flowers to use for an experiment. We have begun studying ‘water’ and its many uses and want to find out more about how living things like plants, use water.
Using our prior knowledge we think:
- Plants need water to survive and grow healthy and strong.
- Water travels through the stem and is used by the plant.
THE EXPERIMENT & PREDICTIONS:
Vase 1 – Flower in water
The flower will die because it doesn’t have any soil. – Amelia
The water will help the plant stay alive. – Amira
The water will keep the plant healthy. – Abbey
The flower with water will survive longer with water. – Luka
Vase 2 – Flower in water with red food colouring
I predict that with both of the food colouring vases, when the stem sucks up the water, the stem will turn blue or red and the petals will change to that colour too. – Seanna
I predict if you put red food colouring inside the vase it will turn the flower red. – Mathew
Vase 3 – Flower in water with blue food colouring
If you add food colouring to the water, then the bud will grow blue petals. – Kai
Vase 4 – Flower with no water or colouring
It might get crusty and will dry up. – Sam
The leaves might fall of and the flower might go brown. – Tyron
The flower without water won’t grow anymore. – Helen
How long will the flower without water live for?
1 week. That’s how long it will take a person to die without water. – Mathew.
3 days. – Tyron
How will the bud grow if it’s not in the water? – Mathew
We discussed and looked at the part of the plant that was in the water. We saw and named the ‘stem’ and most students thought that it was the stem that the water will travel through, to get to the bud.
This lead us to think that we could add a fifth vase, with purple food colouring. In this vase we will put a flower upside down so the the stem is pointing up into the air.
Our prediction: If we put a flower upside down in water then it won’t grow.
At the end of our discussion, the students did some scientific recording. They sketched and labelled each of the 4 vases and flowers and wrote their own predictions about how each might grow or change, depending on their conditions. Some great adjectives were used along the way. Check out their thoughts…