Reflection Starch test in plants(Yr7&8)

Photosynthesis is the process in which green plants (primarily) convert energy from the sun’s light into usable, chemical energy. Starch is a white and powdery substance. It houses glucose, which plants use for food. The presence of starch in a leaf is reliable evidence of photosynthesis.



Starch Testing Experiment
Leaves, Beaker, Test Tube, Bunsen burner, Ethanol, Iodine solution.

Boil the water and dip the leaf for one minute. After that, remove the leaf from water. Next is take ethanol in the test tube and boil the test tube in the bathtub. Then, put the boiled soft leaf in an ethanol test tube. The leaf will drop its chlorophyll in ethanol and turns light yellow. Then, remove the leaf from ethanol in a petri dish and put some iodine solution on a leaf. You will see leaf will turn into brown. That shows the starch present in the leaf.

A leaf is boiling in water

Add Ethanol and leaf in test and boil in water tub

L

Leaf started to boil and left colour(Chlorophyll)

Add iodine on leaf and it turns brown

"Teach-in ways that ensure all learners are making sufficient progress, and monitor the extent and pace of learning, focusing on equity and excellence for all."
"Use an increasing repertoire of teaching strategies, approaches, learning activities, technologies and assessment for learning strategies and modify these in response to the needs of individuals and groups of learners."

Distance Teaching                                                                                                                                                         Date 5 May 2020

This week I taught LEAVES to my Intermediates(STEAM). They enjoyed. They were so focused on their learnings and were very excited about leaves. We started the topic with a simple discussion of the name of some leaves we eat every day. They gave excellent answers like Basil, celery, coriander etc.



They know about leaves, but when we discussed how leaves make food and why we called Leaves are food factories, they enjoyed that content about leaves. Every time, in school, I usually experiment on every topic, but this time in this lockdown, it was hard to do online. The bit I tried at least I can show them some leaves. So, I told them, go and bring some leaves from your garden. In this way, I teach them. We talked about stomata, guard cells, palisade cells, and chlorophyll.

It was outstanding lessons, and students love it. I suggest they click photos of different plant leaves and make a beautiful collage. They were done very well. Here is the My students' work Alanna. She is from Glen Taylor school and very good at science. She is so creative and energetic in her learning. I am happy she loves this topic and make a beautiful collage of leaves.


"Develop learning-focused relationships with learners, enabling them to be active participants in the process of learning, sharing ownership and responsibility for learning."