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8/14/2019 20090728140736 Lect 5_Data Logging 3E Model
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AN ELECTRONICINSTRUMENT THATRECORDSMEASUREMENTS OVERTIME. THE READINGSARE THENTRANSFERRED TO THECOMPUTER
UTILIZEDSOFTWARE(DISCOVERY) USED TO READINFORMATIONFROM SENSORSTO CONVERT APHYSICALQUANTITY INTOAN ELECTRICALSIGNAL.TYPES: LIGHT,TEMPERATURE,SOUND, pHHUMIDITY,PULSE,
DISSOLVEDOXYGEN ETC.
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I Can Freeze And Boil !
ENGAGE
Do you think its
FREEZING here?
Can you see this
phenomenon inMalaysia?
Wh ?
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Is it FREEZING here
or BOILING ?
At what temperaturedoes this process
happen?
I Can Freeze And Boil !
ENGAGE
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EMPOWERPlanning and Doing YourExperimentPart 1: The freezing point of water
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EMPOWERResults
Part 1: The freezing point of water
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ResultsPart 1: The freezing point of water
EMPOWER
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DiscussionPart 1: The freezing point of water
Questions1. What do you observe when the water freezes?2. Look at your graph, what is the freezing point of
water?
3. What happened to the water temperature duringfreezing?4. How are the concepts of melting point and
freezing point related?5. How are these two concepts different?
EMPOWER
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Planning and Doing YourExperiment Part 2: The boiling point of water
EMPOWER
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ResultPart 2: The boiling point of water
EMPOWER
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EMPOWERResult
Part 2: The boiling point of water
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Questions
1.What do you observe when the water boils?2.How long should you boil the water?
3.Why is the temperature keep on rising?
4.Look at your graph, what is the boiling point of water?
5.What is the physical form of water when it is boiling?
EMPOWERDiscussion
Part 2: The boiling point of water
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ENHANCE
Pressure cooker reduce the
cooking time and save nutrients.Explain.
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ENGAGEIts bigger but lighter !
What ingredients do you need to make a bun?What ingredients do you need to make a bun?
What makes the dough expand and becomesWhat makes the dough expand and becomesbigger?bigger?
Is there any gas released during the process?Is there any gas released during the process?Does the dough becomes hotter?Does the dough becomes hotter?
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Planning And Doing YourExperimentEnd Product Of Fermentation
Sensors:
pH &temperature
EMPOWER
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EMPOWERPlanning And Doing YourExperimentEnd Product Of Fermentation
TemperatureTemperatureData Loggerata Logger
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ResultEnd Product Of Fermentation
EMPOWER
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Temperature
pH
EMPOWERResult
End Product Of Fermentation
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DiscussionEnd Product Of FermentationQuestions
EMPOWER
1. Which graph is which?2. What does the graph tell you about the change in
pH during fermentation?3. Why does the pH change?4. What does the graph tell you about the change in
carbon dioxide level during fermentation?5. Why does the carbon dioxide level change?6. How do the graphs change with respect to each
other? Is there a pattern here?
7. What is the end product of this experiment?7. What is the end product of this experiment?State the equation of yeast fermentation.State the equation of yeast fermentation.
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End Product Of Fermentation
ENHANCEDiscuss the importance of fermentationDiscuss the importance of fermentation
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EXTENSIONFind out the new technique in fermentation by
using biotechnology in food industrial.
End Product Of Fermentation
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The Bouncing Sound
You are moving into anew house. What will
happen if you scream inthe room of the house?
Does the samephenomena happen if you
scream in this room?Why?
ENGAGE
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Insertthe soundsensor here
Ticking alarm clock
EMPOWERPlanning And Doing YourExperimentThe Reflection and Absorption of SoundThe Reflection and Absorption of Sound
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Wood Glass
Sponge Metal
EMPOWERPlanning And Doing YourExperimentThe Reflection and Absorption of SoundThe Reflection and Absorption of Sound
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Questions
EMPOWERDiscussion
The Reflection and Absorption of SoundThe Reflection and Absorption of Sound
1.1. Study the results that you obtained.Study the results that you obtained.a. What type of surfaces is good reflectora. What type of surfaces is good reflector
of sound?of sound?
b. What type of surfaces is good absorberb. What type of surfaces is good absorberof sound?of sound?
2. You can hear the ticking sound of the clock2. You can hear the ticking sound of the clockat the other end of the tube. Why doesat the other end of the tube. Why doesthis happen?this happen?
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The echoes in the studio can be reducedbecause the sound is absorbed by soft
and rough surfaces. Name the objects inthis studio that can absorb the sound.
ENHANCE
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Bats produce high-pitched beeps or clicks and
listen for the echoes of these sounds as they are
reflected off by objects. How can bat measurethe distance of and object? Plan and carry out
and experiment to find out. Students may use
different distances of tube containing the sound
source (use varies distance of tube A) and record
The BouncingSound
EXTENSION
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