Wednesday, 7 December 2011

Science Year 5 - Acid and alkaline

Subject             : Science  ( Year 5 )
Date                 : 25.10.2011 (Tuesday)
Time                : 10 : 00 – 10 : 30 (30 min)
Standard           : 5S
Enrolment        : 41 pupils
Topic                : Acid and alkaline
Sub-topic          : 2.1 Understanding the properties of acidic , alkaline and neutral substances
Learning Outcomes : By the end of the lesson, pupils will be able to
a)      Identify acidic, alkaline and neutral substances using litmus paper.
b)      Identify the taste of acidic and alkaline food.
Previous knowledge : Pupils have learnt about
a)      The tastes of food substances and colour.
b)      Mixing vinegar with baking powder in Year 3.
Thinking skills : Making hypothesis, generating ideas, making conclusions
Moral values : Being cooperate, being respect
Teaching and learning resources : Litmus paper, lemon, tooth paste, soap, cooking oil, vinegar, canned drink, shampoo, sugar, salt, yogurt

                             









STEP/TIME
CONTENT
ACTIVITY
REMARKS

Introduction
(5 min)

To predict the taste of substances.

1  Teacher ask pupil about the taste of lemon.
Answer :The taste is sour.
2. Teacher explain that substances can be classified  as acidic, alkaline and neutral.
3. Teacher as people to observe the the colour change of the wet red and blue litmus paper after put on the lemon.
Observation: The red colour of litmus paper no changes colour, but the blue colour of litmus paper changes to red colour.
4. Teacher asks pupils to carry out hands-on activity to the experiment.


AVA:
Lemon
Red and blue colour of  litmus paper

Thinking Skill : predict

Step 1
(10 min)



















Step 2
(5 min)

To observe the change colour of blue and red litmus paper.


















Group discussion to make :
a   Observation
b   Conclusion



1  Teacher asks pupil conduct an experiment in groups to observe the change colour of wet blue and red litmus paper .
2  Teacher provides each group blue and red colour litmus paper and :
Group A  lime, mineral water, shampoo, vinegar.

Group B canned drink, cooking oil, tooth paste, sugar.
Group C  yogurt, salt, shower jell, pineapple .
Group D  soap, liquid detergent, tomato, ketchup.
3  Teacher remind pupils when testing, the litmus paper must be wet, also not to taste the food before being advised to do so.
4  Pupils work in groups and record their finding on the change colour of blue and red litmus paper.


1   Teacher asks pupil to discuss in group to make hypothesis and conclusion.

2   Teacher goes around to observe pupils.


AVA :
litmus paper, lime, mineral water, shampoo , vinegar, canned drink, cooking oil, tooth paste, sugar, yogurt, salt, shower jell, pineapple, soap, liquid detergent, tomato and ketchup.


Thinking Skill: to observe

Moral Value : Being cooperate







Thinking Skill : Observation and conclusion

Moral Value  : Being cooperate

Step 3
(7min)

Summarizing

1  Teacher asks each group make presentation for group discussion.
2   Pupils respond :
Lime, vinegar, canned drink, pineapple, tomato :
changes blue litmus paper to red colour, but red litmus paper no changes the colour.
The taste : sour


Shampoo, tooth paste, liquid detergent , soap :
changes red litmus paper to blue colour, but blue litmus paper no changes the colour.
The taste : bitter

mineral water, sugar, yogurt, salt, ketchup :
No changes red and blue litmus paper colour.
The taste : neutral , sweet or sour

3  Teacher discuss the answer 
with pupils.


Moral Value : Being respect

Closure
(3 min)




1   Teacher give worksheet to each pupil.
2   Teacher goes around to observe pupils.

AVA : worksheet


 Remarks : Teacher  can play the information.














Name : 
 Class :

Topic : Acid and alkaline

1.      Lee Fong and Fatimah carried out an investigation on the properties of substances M, N and O.
They used blue and red litmus papers to investigate the properties of the substances. The table below shows the observations of the investigation.



Substance
The colour changes of litmus paper
Red litmus paper
Blue litmus paper
M
No change
No change
N
Change to blue
No change
O
No change
Change to red


(a)    State the thing that is kept the same.

      ___________________________________________

(b)   Explain the colour changes of litmus paper on Substance N.

___________________________________________

(c)    Based on the observations above, predict the taste of Substance M and N.
(i)  Substance M: ___________________________ 
                             
(ii)  Substance O: __________________________



Underline the correct answers.

1.      ( Alkaline , Neutral ) substances are slippery to the touch and taste bitter.

2.      The pH value of neutral substances is ( 7 , 8 ) whereas acidic substances has the pH of ( 1-6 , 8-14 ).

3.      Strong acidic and alkaline substances are ( corrosive , tetanus ) and ( protest , burn ) our skin.

4.       ( Salt water , Soap ) does not change the colour of a litmus paper because it is ( neutral , acidic ).

5.      Substances that taste bitter are generally ( acidic , alkaline ).

Friday, 2 December 2011

Science Year 4 --- Harmful Habits ( Drugs And Alcohol )

Subject             : Science
Time                : 10 : 00 – 11: 00 (60 min)
Topic                : Living Things Have Basic Needs
Sub-topic          :  1.14 Harmful Habits – Drugs And Alcohol
Learning Outcomes : By the end of the lesson, pupils will be able to
a)      Give examples of habits that bring harm to human life.
b)      Explain that taking drugs and alcohol can delay a person’s response to stimuli.
Previous knowledge : Pupils have learnt about,
a)      Smoking, drugs and alcohol is harmful to people
Thinking skills : Making predict, making hypothesis, making conclusion
Moral values : Being appreciate , being carrying

Teaching Strategies :
1        Teacher plays the introduction component and asks pupil to predict the effects of drinking alcohol.
video
               

2        Teacher encourage pupils to discuss and give answers to the questions.

3        Teacher plays the content component .

video


4        Teacher asks pupils discuss in group the bad effects of taking drugs.
5        Pupils present their discussion.
6        Teacher plays the content component.

video

7        Teacher concludes the lesson by going through the summary component.

video

Thursday, 1 December 2011

Science Year 4 --- Humans Excrete And Defecate

Subject             : Science

Time                : 10 : 00 – 11 : 00 (60 min)

Topic                : Living Things Have Basic Needs

Sub-topic          :  1.10 Humans Excrete And Defecate

Learning Outcomes : By the end of the lesson, pupils will be able to
a) State the humans excrete and defecate.
b) Give reason why humans need to excrete and defecate.

Previous knowledge : Pupils have learnt about,
a) Humans breathe.


Thinking skills : Generating ideas, making conclusions
Moral values : Being appreciate , being honest

Teaching Strategies :
1 Teacher plays the introduction.


video
             

2 Teacher asks pupils to gives examples of activities that would make them sweat.
3 Teacher plays the content component.

video

video


4 Teacher asks about the different between  excrete and defecate.

5 Teacher plays the content component.

video


video


6    Teacher plays this component to show human defecate.

video
              
video


7     Teacher plays the summary component. Teacher conclude that humans need to                                    
excrete and defecate  to saty healthy.                                                                                             


  video








Science Year 4 --Harmful Habits (Smoking)

Subject             : Science
Time                : 10 : 00 – 11: 00 (60 min)
Topic                : Living Things Have Basic Needs
Sub-topic          :  1.13 Harmful Habits -- Smoking
Learning Outcomes : By the end of the lesson, pupils will be able to
a)      Give examples of habits that bring harm to human life processes.
b)      State the effect of smoking on lungs.
Previous knowledge : Pupils have learnt about,
a)      Smoking is harmful to people
Thinking skills : Making predict, making hypothesis, making conclusion
Moral values : Being appreciate , being carrying

Teaching Strategies :
1        Teacher plays the introduction component and asks pupil how they feel when people around them smoke?
video
               

2        Teacher encourage pupils to discuss and give answers to the questions.

3        Teacher plays the content component.

video


4        Teacher asks pupils discuss in group why is smoking a harmful habit ?
5        Pupils present their discussion.
6        Teacher plays the content component.
video

7        Teacher concludes the lesson by going through the summary component.
video


8        Teacher asks pupils to make a poster to show the bad effects of smoking.