To determine on what the seeds need for germination to take place.
Process:
Teacher to elicit from pupils on the above and to get the pupils to design on the below setups for confirmation.
Pupils' inputs upon elicitation prior the experiment:
The seeds need air, water, sunlight and warmth for germination to take place.
Set up 1 - Air + Water + Sunlight (in front of the window)
Day 1 - Start of experiment
Day 2 - Not much change except for the softening of the seed coat
Day 3 - About the same as day 2
Day 4 - The seeds started to sprout. :)
Day 6 - Roots are longer by now.
Day 8 - The plants have grown taller.
Set up 2 - Limited Air (air tight container) + water + sunlight (in front of window)
Day 1
Day 2 - Sprouting took place (Do you know why?)
Day 3 - The roots are getting longer
Day 4 - The shoots and the leaves appeared.
Can you identify them? Are you also able to identify the seed leave?
Day 6 - Wow... they have grown so tall! :)
Day 8 - They are getting taller by each day! :)
Set up 3 - Limited Air (as suggested by pupils) + Water + Sunlight (Placed in front of the window)
Day 1
Day 2 - One of the seeds sprouted (Do you know why?)
Day 3 - The other four seeds also sprouted
Day 4 - The first seed to sprout has its shoot and leaves now.
Day 6 - All have sprouted and are able to see the shoots and leaves now.
Day 8 - They are getting taller by each day! :)
Set up 4 - Very limited Air (Tried to squeeze out all the air) + Water + Sunlight (Placed in front of the window)
Day 1
Day 2 - Seeds sprouted!!!! (Why?)
Day 3 - The roots are longer now, and water vapour can be seen on the surface of the bag
Day 4 - I can see the shoot, seed leave and leaves now.
As the inital bag is too small, I had to move the plants to another bigger bag.
Day 6 - They are growing fast. :)
Day 8 - They have grown surprisingly big by day 8.
Set up 5 - Air + Water + No Sunlight (Placed inside the computer console)
Day 1
Day 2 - No visible change at the moment
Day 3 - No visible change at the moment
Day 4 - No visible change at the moment.
Day 6 - Yay!!! They have finally sprouted! :) Wow! They can germinate even at dark places!
Day 8 - They are getting taller by each day.
Set up 6 - Air + Water + No warmth (Placed inside the fridge)
Day 1
Day 2 - No visible change at the moment
Day 3 - No visible change at the moment
Day 4 - No visible change at the moment.
Day 6 - No visible change at the moment.
Day 8 - Wow!!!! Three of the five seeds have sprouted in the fridge!!!!
What do you think happen?
Set up 7 - Air + No Water (Dry cotton pad) + Sunlight (Placed in front of the window)
Day 1
Day 2 - No visible change at the moment
Day 4 - No visible change at the moment.
Day 6 - No visible change at the moment.
Day 8 - The seeds have not germinated.
