Page 23 - PWR UP TG3 SAINS

Sains Tingkatan 3 Bab 1
10. Deria pendengaran dan penglihatan mempunyai had keupayaan. Kita tidak dapat melihat objek yangterlalu
halus atau terlalu jauh. Kita juga tidak boleh mendengar bunyi yang sangat perlahan. SP 1.2.4 TP2
The sense of hearing and the sense of vision have a limitation. We cannot observe tiny objects or objects that are too far away. We also
cannot hear sound that is too slow.
(a) Nyatakan satu contoh:
State one example of:
(i) Objek yang sangat jauh / Very distant object – Objek di angkasa lepas / Object from outer space

(ii) Objek yang sangat kecil / Very small object – Bakteria; virus / Bacteria; virus

(iii) Bunyi yang sangat perlahan / Very slow sound – Denyutan nadi; degupan jantung / Pulse; heartbeat

(b) Bagi situasi yang dinyatakan dalam (a), namakan alat yang dapat mengatasi masalah ini. TP3
For the situation stated in (a), name the tool that can overcome the problem.
(i) Binokular / Binocular

(ii) Mikroskop / Microscope

(iii) Stetoskop / Stethoscope

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PBD 1.3 Rangsangan dan Gerak Balas dalam Tumbuhan
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Stimuli and Responses in Plant Buku Teks ms. 36-40
1. Tumbuhan melakukan dua jenis gerak balas iaitu gerakan tropisme dan gerakan nastik. SP 1.3.1 TP1
Plants perform two types of response, namely, tropism and nastic movement.
(a) Padankan pernyataan dengan jenis gerak balas.
Match the statements to the type of response.
(i) Bunga matahari kembang ke arah barat pada waktu petang.
Sun owers bloom westwards in the evening.

(ii) Pokok orkid merpati tumbuh di dahan pohon kayu yang tinggi. Gerak balas tropisme
Pigeon orchid grows on tall tree branch. Tropism response
(iii) Daun pokok semalu menguncup apabila disentuh. Gerakan nastik
The leaves of mimosa pudica quickly fold when touched.
Nastic movement
(iv) Akar dedalu menembusi batang pohon kayu yang ditumpangnya.
Willow roots penetrate the trunk of the tree on which it rests.
2. Bandingkan gerak balas tropisme dan gerakan nastik. SP 1.3.1 TP1
Compare tropism and nastic movement.
Persamaan / Similarity
Kedua-dua bergerak balas terhadap rangsangan / Both respond towards the stimuli
Perbezaan / Di erence
Gerak balas tropisme berarah manakala gerak balas nastik tidak berarah; gerak balas tropisme lebih perlahan
Tropism response is directional while nastic response is non-directional; tropism response is slower
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01 Power Up SC Tg3_p1-23.indd 12 9/28/20 9:48 AM