Growing Plants…

We have been learning about plants in Science in Pearl Class. We know that seeds can grow into lots of exciting things such as fruit, vegetables and flowers. Seeds come in all different shapes and sizes.

We wanted to know what the different parts of a plant are called as it stars to grow.

Then we though about what plants need to grow in. We learnt that all plants need air, water and sunlight to grow. But do all plants need soil to grow in? We set up lots of different seeds to investigate what would happen to the seeds without any soil. Would they grow? Take a look below to find out our findings…

Finally we though about what might happen if we took away just one of things that plants need to grow and investigate what happened. We set up different pots and planted both seeds and bulbs inside to see what would happen in the different circumstances. We made predictions as to what we thought might happen to each pot. Here is what we did:

Pot 1 – Sand instead of soil

Pot 2 – No air (water, soil and light)

Pot 3 – No water (air, light and soil)

Pot 4 – No light (soil, water and air)

Pot 5 – Control (air, light and water)

Every week, we kept a seed and bulb diary so we could see what happened to the seeds and bulbs on a weekly basis. Here is what we found out.

Pot 1 – Neither the seed or bulb grew in the sand.

Pot 2 – Neither the seed or bulb grew with no air.

Pot 3 – Surprisingly both the seed and bulb grew in the soil with no water. (We discussed that the soil might have had water in it already to help the seed and bulb grow)

Pot 4 – Both the seed and bulb grew in the dark but they were both yellow.

Pot 5 – Both the seed and bulb grew as predicted.

We found out:

  • If you put a plant in the dark, it will grow but it will turn yellow. Plants need sunlight to help it to make food in its leaves and keep it green. Once we completed our investigation, we left it out in the sunlight and it started to turn green again!
  • If you put a lid on a plant and into a container, it won’t grow however it will go mouldy. When we took the lid off to check, the smell was really gross!
  • We were surprised that the seed and bulb didn’t grow in the sand. If we were to do this again, we would try it out again or try plant it in different things like custard or pebbles.
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Super Scientists

Linked to our work about Florence Nightingale, we looked at the effect germs can have on our bodies and how quickly they can make food mouldy.

We turned into Super Scientists and we had a go at testing our reflexes as well as our sense of smell and touch. It was difficult to guess what the smells and the objects were without using our eyes.

Then we set up an experiment to see how germs could make food mouldy. We used three pieces of bread but did different things to each one.

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  • In the first – we called this CONTROL as we didn’t touch the piece of bread with our hands. We used tongs and placed it into a clear bag.
  • In the second – we called this UNWASHED as we made sure we put lots of germs on the piece of bread by rubbing it between our hands before we placed it into the clear bag.
  • In the third – we called this WASHED as we made sure we washed our hands carefully with soap and water before we rubbed our hands on the piece of bread and placed it into the clear bag.
  • All three bags were placed in the same place so that we could make sure it was a fair test.

We continued to be Super Scientists by making a prediction about which piece of bread would have the most mouldy. Our predictions are below:

  • 2 children thought the CONTROL would have the most mould.
  • 25 children thought the UNWASHED would have the most mould.
  • 3 children thought the WASHED would have the most mould.

We left the bread for a week and our results are below:

  • All three pieces of bread had gone mouldy.
  • It was clear from looking at the pieces of bread that the UNWASHED had the most amount of mould on it, followed by the WASHED and finally the CONTROL.

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As a class, we discussed why the UNWASHED had the most amount of mould on it. It had the most amount of germs on it and the control had none because it hadn’t been touched by anyone’s hands.

We know how important it is to wash our hands before we eat and after we have been to the toilet as we don’t want these germs inside our bodies.

If they can turn bread mouldy, what can they do to the inside of our bodies?