Survival Of The Species ( Plants )

1. Different plants have their own ways to ensure the survival of their species.

2. Plants needs to disperse their seeds or fruits to ensure the survival of their species.

3. Plant that disperse seeds and fruits by water.

Coconut

Lotus

Pong-pong

    The seeds or fruits of the plants that grow at river side or sea side have air space and are light.


4. Plants that disperse seeds and fruits by wind.

Angsana

Lalang

  The seeds or fruits of the plants that are disperse by wind have wing-like structure, dry, have fine
  hairs and are small.

Papaya

5. Plants that disperse seeds and fruits by animals.

Rambutans

Durian

   The fruits of the plants are fleshy, brightly coloured and edible.
   The seeds are hard and cannot be eaten.
   So the animals throw the seeds to another places.

Grass

Love Grass

Mimosas

   The seeds or fruits of the plants have hooks, to stick on animals legs and bodies and dispersed to
   other places.


6. Plants that disperse seeds and fruits by explosive mechanism.

Balsam

Rubber tree

Pea

  When the fruits of these plants ripe, their skin will dry and become hard. Then the fruits explode and
  disperse their seeds.

Phases Of The Moon (Song)

PHASES OF THE MOON

1. Only the part of the moon that faces the Sun can be seen.

2. When the Moon revolves around Earth, the part of the Moon's surface that receives sunlight will 
    change.

3. That is why the shape of the Moon that we can see always changes.

4. The different shapes of the Moon are known as phases of the Moon.

5. The phases of the Moon consists of:

    (a) New moon

• The surface of the Moon that is not illuminated is facing Earth.
• The Moon cannot be seen from earth. 

New Moon

    (b) Crescent  
  

Crescent

    (c) Half moon ( First quarter )

• The surface of the Moon that is illuminated and facing Earth increases.
• The Moon looks bigger and rounder.     

Half moon (First quarter)

    (d) Gibbous

• The surface of the Moon that is illuminated and facing Earth increases.
• The Moon looks bigger and rounder.

Gibbous

    (e) full moon

• The whole surface of the Moon that receives sunlight faces Earth.
• The Moon looks big and round.

       

Full moon

    (f) Gibbous

Gibbous

    (g) Half Moon ( Last quarter )

• The surface of the Moon that is illuminated and facing Earth decreases.
• The Moon looks smaller.

Half Moon (Last quarter)

    (h) Crescent

Crescent

6. The Moon takes about 29.5 days to return to the same phase.

7. The Lunar Calendar is a calendar created based on the revolution of the Moon around Earth,
    following the phases of the Moon.

8. According at the Lunar Calendar, the Moon experiences full moon on the 15th of every month.

 

Measuring the temperature of the water

Question: What are the changes in the temperature of water when heat is gained and lost?

Aim: To study changes in temperature of water when heat is gained and lost.

Apparatus: Retort stand, matches, beaker, tripod stand, thermometer, bunsen burner, wire guaze and
                  water.

                                                                                                  
Procedure:
1.  Pour water into the beaker, measure the temperature of the water.

2. Heating the water three minutes, record the temperature of the water every one minute.

3. After three minutes, turn off the bunsen burner, record the temperature of the water until the sixth
    minute.

4. Record the observation in Table 1.

    Observation:
    

Stage	Before heating		During heating			After heating
Time (minutes)	0	1	2	3	4	5	6
Temperature	25	32	38	60	42	38	30

  
                                                                   Table 1

Discussion: What to keep the same in the experiment?

                    Volume of water used.

Conclusion: Temperature of water increases when heating the water, while temperature of water    
                    decreases when stop heating the water.