Engage

1

UTI LI ZED SO FTW AR E (‘DIS CO VERY ’) – USED TO READ INFO RMA TI ON FRO M SEN SO RS

AN ELEC TRO NIC INSTR UMEN T TH AT REC OR DS MEA SU REM EN TS OVE R TI ME. TH E RE AD INGS ARE THE N TR AN SFER RED TO TH E COM PU TER

TO CO NVE RT A PHYSICAL QU ANTIT Y IN TO AN E LE CTRICAL SIGN AL. TYP ES: LIG HT , TEM PERA TURE , SOUND , pH HU MID IT Y, PULS E, DIS SOLVE D2 OX YGE N E TC.

EN GAG E

I Can Freeze And Boil ! Do you think it’s FREEZING here? Can you see this phenomenon in Malaysia? Why?

3

EN GAG E

I Can Freeze And Boil !

Is it FREEZING here or BOILING ? At what temperature does this process happen? 4

EMPO WE R

Pl anni ng and Doi ng Your Exper iment Part 1: The freezing point of water

5

EMPO WE R Resul ts

Part 1: The freezing point of water

6

EMPO WE R Results

Part 1: The freezing point of water

7

EMPO WE R Disc uss ion

Part 1: The freezing point of water

Qu estions 1. 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 during freezing? 4. How are the ‘concepts’ of melting point and freezing point related? 5. How are these two concepts different? 8

EMPO WE R

Planni ng and Doi ng Your Experi ment Part 2: The boiling point of water

9

EMPO WE R Resul t

Part 2: The boiling point of water

10

EMPO WE R Resul t

Part 2: The boiling point of water

11

EMPO WE R Di scussi on

Part 2: The boiling point of water

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? 12

ENHAN CE

Pressure cooker reduce the cooking time and save nutrients. Explain. 13

ENG AG E

Its bigger but lighter !

What ingredients do you need to make a bun? What makes the dough expand and becomes bigger? Is there any gas released during the process? Does the dough becomes hotter?

14

EMPO WE R

Pl anni ng And Doi ng Your Experi ment End Product Of Fermentation

Sensors: pH & temperature

15

EMPO WE R

Pl anni ng An d Do ing Your Experi ment End Product Of Fermentation

Data Logger Temperature

16

EMPO WE R Resul t

End Product Of Fermentation

17

EMPO WE R Resul t

End Product Of Fermentation

Temperature

pH

18

EMPO WE R Disc ussion

End Product Of Fermentation

Questions

1. Which graph is which? 2. What does the graph tell you about the change in 3. 4. 5. 6. 7.

pH during fermentation? Why does the pH change? What does the graph tell you about the change in carbon dioxide level during fermentation? Why does the carbon dioxide level change? How do the graphs change with respect to each other? Is there a pattern here? What is the end product of this experiment? 19 State the equation of yeast fermentation.

ENHAN CE

End Product Of Fermentation

Discuss the importance of fermentation

20

EXTE NSI ON

End Product Of Fermentation

Find out the new technique in fermentation by using biotechnology in food industrial.

21

EN GAG E

The Bouncing Sound You are moving into a new house. What will happen if you scream in the room of the house? Does the same phenomena happen if you scream in this room? Why? 22

EMPO WE R

Pl anni ng An d Doi ng Your Experi ment

The Reflection and Absorption of Sound

Insert the sound sensor here Ticking alarm clock 23

EMPO WE R

Pl anni ng An d Doi ng Your Experi ment

The Reflection and Absorption of Sound

Wood

Glass

Sponge

Metal

24

EMPO WE R Disc ussion

The Reflection and Absorption of Sound

Questi ons 1. Study the results that you obtained. a. What type of surfaces is good reflector of sound? b. What type of surfaces is good absorber of sound? 2. You can hear the ticking sound of the clock at the other end of the tube. Why does this happen?

25

ENHAN CE

The echoes in the studio can be reduced because the sound is absorbed by soft and rough surfaces. Name the objects in this studio that can absorb the sound.

26

EXTE NSI ON The Bouncing Sound

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 measure the 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 different magnitude of echo produce by it.

27

28