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ANNUAL REFRESHER TEACHERS TRAINING JULY 2011. ACTION PLAN DA Model High School PH:IV. PRESENTED BY : Ms TABASSUM NASEER. transpiration. CONTENTS. Transpiration Transpiration pull Process of transpiration in plants (Experiment) Stomata (structure & function) - PowerPoint PPT Presentation
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ANNUAL REFRESHER TEACHERS TRAINING
JULY 2011
A C T I O N P L A N
D A M O D E L H I G H S C H O O L P H : I V
PRESENTED BY :
Ms TABASSUM NASEER
TRANSPIRATION
CONTENTS
Transpiration Transpiration pull Process of transpiration in plants
(Experiment) Stomata (structure & function) Factors affecting the rate of
transpiration Hazards
TRANSPIRATION
Objectives 21st Century skills
Bloom’s Taxonomy
21st Century Approaches
Remembering
Understanding
Applying
AnalyzingEvaluating
Creating
BLOOM’S TAXONOMY
LONG TERM GOAL
•Using Bloom’s Taxonomy to develop higher order thinking in students
•To relate 21st century approaches with 21st century skills in order to promote student centered learning
High Order
Thinking
Create
HIGH ORDER
THINKING
ANALYZING
CREATE
EVALUATING
Short Term Goals
SHORT TERM GOAL
AnalysisAnalysis
By the end of this topic
students will be able to analyze the process of
transpiration and prepare a
report.
By the end of this topic
students will be able to analyze the process of
transpiration and prepare a
report.
SHORTTERMGOALS(CONT)
By the end of this lesson students will be able to Compare the transpiration with other process and make a conclusion
EvaluationEvaluation
SHORTTERMGOALS(CONT)
Creation CreationBy the end of this lesson students will be able to set up a project to show the process of transpiration
By the end of this lesson students will be able to set up a project to show the process of transpiration
• BRAIN STORMING• INTRODUCTION
Monday
• Understand• Explain• Experiment
• Examples
Tuesday
• Display • Feed back• QUIZ
Friday
Timeline(Dimensions of Bloom’s Taxonomy)
INSTRUCTIONAL STRATEGIES
TOPIC TRANSPIRATION
21st Century Approach
Giving direction, listening & speaking skills
Techniques/Modes
Report, speech, project & presentation quiz.
21st Century Skills Communication skills, creativity, self direction & media literacy
To understand the process of transpiration.
To know the factors that affect the process of transpiration.
To understand the importance of transpiration to plants
OBJECTIVES:
WHAT IS TRANSPIRATION?
•.
“The loss of water vapor from the plants, especially through stomata
is called transpiration”.
Transpiration may also refer to sweating
WHAT HAPPENS DURINGTRANSPIRATION?
IMPORTANCE OFTRANSPIRATION:
Creates transpiration pull for transport
Supplies water for photosynthesis
Transports minerals from soil to all parts of a plant
Cools the surface of the leaves (due to the evaporation of water)
Keeps the cells turgid; hence, maintains their shape
ACTIVITY APPARATUS:
Petroleum jelly
Water
Beaker
Oil
Bell jar/ polythene bag
METHODTake a potted plant
Cover it with the polythene bag
Put the set up under the sunlight
Observe what happens
After two hours inside the surface of the Bell jar/ polythene bag will be examined
After two hours small drops of water can be seen and these water vapours comes out from the leaves of the plant
STOMATA
Leaf surfaces are dotted with openings which are collectively called stomata
The stoma (singular of stomata) is bordered by guard cells that open and close the pore
STRUCTURE OF STOMATA
The two bean shaped cell around the stomata are called guard cell.
Change in the size of a stoma is caused by changes in the shape of guard cell.
When stoma is open, CO2& O2 move from air in to the leaf& from leaf in to the air.H2O also escapes through stoma.
How do the guard cells react to the availability of water?
Dry – guard cells CLOSE
lots of H2O – guard cells OPEN
http://www.ualr.edu/~botany/images.html
Function of Guard Cells
V I D E O
1. Transpiration:The process by which plants cool their leaves by the evaporation
of water from the leaves' surfaces or Transpiration is the loss of water from the plant to the atmosphere in the form of vapor.
2. Stomata:The pore like openings on the bottom surface of leaves through
which water and gases pass as they leave the plant. Leaf transpiration occurs through stomata, and can be thought of as a necessary "cost" associated with the opening of the stomata to allow the diffusion of carbon dioxide gas from the air for photosynthesis. Transpiration also cools plants and enables mass flow of mineral nutrients and water from roots to shoots.
OVERVIEW:
3. Guard Cells: The guard cells open and close the stomata as needed. They open the stomata when temperatures are high. They close the stomata when the
plant is water stressed and when the temperature drops.
4. The amount of water that plants transpire varies greatly geographically and over time. There are a number of factors that determine transpiration rates:Temperature: humidity. Wind. Soil water
REFERENCES:
Link: http://plantandsoil.unl.edu/croptechnology2005/pages/?what=animationList *Select Transpiration (5th from the bottom) www.gaaged.org Read more: http://www.brighthub.com/environment/science-environmental/articles/64818.aspx#ixzz1Q3ltXS4R IMAGE CREDIT: All images are courtesy of Wikimedia &Google What 21st Century Technology was used in this unit Video Image File(s) EmailAudio File(s)Student Response System
QUIZ
DA MODEL HIGH SCHOOL PH: IVStudent Activity Pre-Assessment
CLASS: VII TOPIC: Transpiration
NAME: _________________ SEC: __________________1. Complete the blanks in the sentence below. A plant absorbs water through its ______________, and looses water through its _______________. 2. What are the functions of leaves?
A. capture lightB. exchange gasesC. provide a site for photosynthesisD. some leaves store food and waterE. some form new plants and provide support
3. Plants lose water from the leaves into the air. This process is called____________.4. Transpiration is done by a force which is exerted by the plant on the water and this force is called __________.5. The two bean shaped cell around the stomata are called__________.6.__________ permits gaseous exchange with the atmosphere. 7 .Transpiration may also refer to ____________.8. ____________ is a process similar to evaporation.9. 10% water is kept within the plant & __________is lost through transpiration.10. ______________ closes the stomata when the plant is water stressed and when the temperature drops.
THE END