20090728140736 lect 5_data logging 3e model

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
http://www.chem4kids.com/http://www.chem4kids.com/


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EMPOWERResults

Part 1: The freezing point of water
http://www.chem4kids.com/http://www.chem4kids.com/http://www.chem4kids.com/


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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.
http://www.stainlesspressurecookers.com/images/Pressure%20Cookers/42010%2010Qt%20PressureCooker.jpg


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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?
http://www.chem4kids.com/


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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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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.



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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
http://www.chem4kids.com/


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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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http://www.preparedpantry.com/index.asp?PageAction=VIEWPROD&ProdID=539

20090728140736 lect 5_data logging 3e model

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