Saturday 29 February 2020

What plants need to grow

Our Science topic for this half term is plants: looking at what they need to grow, their basic structures and functions, and their life cycles in terms of flowering, pollination, seed formation and dispersal.

We were gifted a carnivorous plants display from my parents - which I've been putting off planting over the winter as we were back and forth between Ipswich and Birmingham so wouldn't have been able to look after them well - so we finally got round to planting those! We also had a few flower seeds from my nephew's birthday party so we planted those too.


I asked the girls what they thought the plants needed to grow well - what did they already know? They said water, light and soil because they remembered our sunflower experiments in the garden from previous years. 😁🌻🌻🌻 We looked in one of their science books about plants so they could check and they remembered plants also need air - because they "breathe" in carbon dioxide and breathe out oxygen, which is the opposite of what animals do.

I told them I was going to put their flowers and carnivorous plant display on the sideboard where they could get lots of sun because I wanted them to grow well, inshaAllah. And we needed to remember to water them often! They were already in soil and they weren't covered up so should be able to get plenty of air.

Then I asked them if we could design an experiment to test if they were right about these four factors being important for plant growth... We could use cress seeds and see what happens if we tried to grow them without those things. Could they design an experiment to see which one of those things is the most important, maybe? How could they make it a fair test?

With some  discussion, they came up with the following:


They both found the "no soil" pot hilarious for some reason. 😂😂

Z didn't really take part in the designing an experiment part, but she understood we had 4 different pots to compare how the seeds would grow without either light, water, soil or air. And the 5th pot had all four things to be the control, so to show how the plant is supposed to grow.

Once the cress has sprouted, inshaAllah, we can discuss what they'll observe and why it happened. 🌱🌱🌱🌱🌱

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