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Why do Leaves Change Color in the fall?

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by

amber hicks

on 26 August 2013

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Transcript of Why do Leaves Change Color in the fall?

Why do Leaves Change Color in the fall Lesson Plan

Leaves!
Leaves Cont..
Conclusion of lesson
The start
To start my lesson I will give the students a KWL chart. Then, I will present them with a green, yellow, orange and red leaf. I will ask them to write down what they know about the leaves and what they want to know about the leaves. I will give them about 2 minutes to write their details down. I then will say put your pencils down and all eyes on me to get their focus back.
After getting their attention back on me I will ask the students to share some things they observed about the leaves. Assuming one of them will say that they are all different colors, I will ask how they think the leaves got to be different colors. We will engage in conversation about how they think the leaves changed colors for a couple minutes.
Carotenoids are the yellow color of leaves. They turn this color when there is not enough sunlight to produce chlorophyll beacuse the days are shorter. Without photosynthesis and chlorophyll the leaves begin to loose their green color.With the abundance of carotenoids and anthocyanins, the leaves begin to turn yellow or red and in some cases both making orange.
Anthocyanins
With that being said I will then show the students the last leaf that is red.
To end the lesson, Homework!!
Students will be asked to write a three paragraph paper summarizing the lesson we went over today. I will tell them to bring leaves of different colors from their yards at home to show the class the following day.
Detail 3
By: Amber Hicks
What Did You Observe?
Vocabulary you need to know!
Students will then get with a partner and go through the text book finding things they think will be beneficial to why the leaves changed colors. They will have 15 minutes to do this
Since they are advanced students I will ask them to write down (with their partner) what they think the words mean. After a couple minutes I will call on 5 students and they will come up to the board and write down what they think the words mean. I will then call on 5 new people to look the definition up in the book and have them read the definition aloud to the class. After they have the correct definition I will ask them based off the definition, what they think these terms have to do with the leaves changing colors
Chlorophyll:
Anthocyanin:
Carotenoid:
Photosynthesis:
Glucose:
Pigment:
Chlorophyll and Photosynthesis
The color green in leaves is produced by chlorophyll. Chlorophyll is an essential part of photosynthesis. Photosynthesis happens when plants break down carbon dioxide, glucose and water into oxygen and food. In summer the days are longer so this means there will be more sunlight. As fall and winter come the days become shorter so it becomes harder for the leaves to produce chlorophyll due to the lack of sunlight.
Carotenoids
I will show the students the yellow leaf and ask them to identify if it is carotenoids or anthocyanins.
If the leaves turn red this means they have the pigment Anthocyanin.
I will ask the students to get their KWL charts out from the beginning of the lesson. They will have 10 minutes to fill out the learned section of the chart. The first 5 minutes will be without using their notes the last 5 minutes will be using their notes.
Conclusion
After this section I will ask if any student has any quesstions about this section.
I will ask if there is any questions after this section.
I will ask if there is any questions over the sections we just covered. I will have left time to go back and review the material as the questions are asked.
Class discussion
I will start the discussion by asking them to flip their papers over. I will show them a colored leaf and they will have to tell me if it is chlorophyll, carotenoid or anthocyanin. This will transition us into the actual lesson they will be learning.
Full transcript