PLANTS RESPOND TO STIMULI

1. Different parts of plants respond to different stimuli.

2. The movement of a plant involves the growth of certain parts of the plant.

3. Plants respond to the following stimuli:

a) gravity

b) water

c) sunlight

d) touch

4.When a part of a plant grows towards a stimulus it is said to show a positive  

   response.

5. However,when a part of the plant grows away from the stimulus it is said to

   show a negative response.

PLANTS RESPOND TO GRAVITY

1. This is the growth of certain parts of a plant in response to gravity.

2. The roots o the plant grow downwards into the soil while the shoots and

     branches grow upwards.

3. The plant grows downwards into the soil to get water in order to make food.

English-Malay Vocab

                    1. sunlight – cahaya matahari

2.wilt – layu

3. bud – tunas

4. bryophyllum – setawar

5. extinct - pupus

6. fern - paku pakis

7. leaflets - anak daun

8. lovegrass - rumput

9. moss - lumut

10. parent plant - pokok induk

11. root - akar

12. runner - batang rayap

13. shoot - pucuk

14. spores - spora

15. stem cutting - keratan batang

16. sucker - anak pokok

17. survival - kemandirian

18. sweet potato - ubi keledek

19. tapioca plant - pokok ubi kayu

20. touch - sentuhan

21. underground stem - batang bawah tanah

22. young plant - anak pokok

23. water lettuce - kiambang

SCIENCE INFO

§Small plants absorb water through their root by capillary action. This capillary action is similar when you drink water by sucking at the straw.

§Green plants are very important to life on Earth. They give off   oxygen that is needed by living things, including humans.

ª  

BASIC NEEDS OF PLANTS

 PLANTS NEED AIR

Ø  Plants need oxygen from the air for respiration .

Ø  Plants also need carbon dioxide from the air to make food.

Ø  Plants make food through photosynthesis.

Ø  Plants will die without air.

PLANTS NEED WATER

Ø  Plants absorb water from the soil through their roots.

Ø  Plants need water for:

·         Making food during photosynthesis

·         Transporting food and minerals to the plant tissues

·         Keeping the plants cells turgid

PLANTS NEED SUNLIGHT

Ø Green plants can make their own food through photosynthesis.

Ø Sunlight is necessary for photosynthesis.Without sunlight plants will die.

Ø Green leaves contain chlorophyll to trap sunlight.

Ø Sunlight provides the energy needed or water to combine with carbon dioxide to produce glucose in the leaves.Oxygen is produced as a by-product.

INTRODUCTION OF PLANTS

Plants  contribute to the well-being  our world in all kinds of ways,including giving off oxygen and anchoring the soil in place with their roots.We also realy heavily  on plants or food, drinks,medicines, clothes, timber and paper, as well as fuels  such as coal and oil.

SPORES