SainsScience

Print questions onlyCetak soalan sahaja Print with answersCetak dengan skema Print answer key onlyCetak kunci jawapan sahaja Practice shows answers as you go. Exam times you and hides answers until you submit.Latihan menunjukkan jawapan semasa menjawab. Peperiksaan menetapkan masa dan menyembunyikan jawapan sehingga dihantar.

11

QuestionSoalan 11

Baca soalan tentang empat haiwan. Bulatkan jawapan yang betul.Read the questions about four animals. Circle the correct answer.

[1 markmarkah] (a)Seekor lebah tidak mempunyai tulang belakang. Lebah ialahA bee has no backbone. A bee is a

AvertebratavertebrateBinvertebratainvertebrate

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invertebrate

[1 markmarkah] (b)Seekor ular ialahA snake is a

AvertebratavertebrateBinvertebratainvertebrate

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vertebrate

A snake has a backbone. It is a reptile.

[1 markmarkah] (c)Seekor cacing tanah bernafas menggunakanAn earthworm breathes with

ApeparulungsBkulit lembapmoist skinCspirakelspiracles

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moist skin

[1 markmarkah] (d)Seekor udang bernafas menggunakanA prawn breathes with

AinsanggillsBkulit lembapmoist skinCspirakelspiracles

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gills

For the teacherUntuk guru: RememberingMengingat, lowrendah difficultyaras lowrendah, Unit 3, standard 3.2.1

TextbookBuku teks p.ms. 59

12

QuestionSoalan 12

Rajah 1 menunjukkan sebuah bendera dinaikkan pada tiang bendera sekolah dengan menarik tali ke bawah.Diagram 1 shows a flag being raised on the school flagpole by pulling a rope downwards.

[1 markmarkah] (a)Namakan mesin ringkas yang terdapat di bahagian atas tiang itu.Name the simple machine at the top of the pole.

AtuasleverBtakalpulleyCsatah condonginclined plane

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pulley

A pulley is a grooved wheel that a rope passes through, to lift or lower a load.

[2 marksmarkah] (b)Tulis beban atau daya bagi
(i) X,
(ii) Y.Write load or force for
(i) X,
(ii) Y.

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• (i) X: load [1 mark]1
• (ii) Y: force [1 mark]1

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[1 markmarkah] (c)Takal digunakan untukA pulley is used to

Amemotong objekcut an objectBmengangkat atau menurunkan bebanlift or lower a loadCmencantumkan dua bahagianjoin two parts

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lift or lower a load

For the teacherUntuk guru: UnderstandingMemahami, lowrendah difficultyaras lowrendah, Unit 10, standard 10.2.1

TextbookBuku teks p.ms. 175

13

QuestionSoalan 13

Hafiz mengkaji bunyi loceng sekolah. Dia meletakkan sebuah meter aras bunyi pada empat jarak daripada loceng seperti dalam Rajah 2. Jadual 1 menunjukkan bacaan meter itu.

Jarak dari loceng	1 m	3 m	5 m	7 m
Aras bunyi	90 dB	80 dB	70 dB	60 dB

Hafiz studies the sound of the school bell. He places a sound level meter at four distances from the bell as shown in Diagram 2. Table 1 shows the readings of the meter.

Distance from the bell	1 m	3 m	5 m	7 m
Sound level	90 dB	80 dB	70 dB	60 dB

[1 markmarkah] (a)Nyatakan satu pemerhatian daripada Jadual 1.State one observation from Table 1.

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• As the distance from the bell increases, the sound level decreases / the sound level is 90 dB at 1 m and 60 dB at 7 m1

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[1 markmarkah] (b)Buat satu inferens mengapa bacaan meter berkurang apabila jarak bertambah.Make one inference why the reading of the meter becomes less as the distance increases.

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• The sound travels in all directions and becomes weaker / less sound reaches the meter when it is further from the bell1

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[1 markmarkah] (c)Ramalkan bacaan meter pada jarak 9 m.Predict the reading of the meter at 9 m.

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• 50 dB (the reading falls by 10 dB for every 2 m: 60 − 10 = 50; number and unit)1

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[2 marksmarkah] (d)Nyatakan
(i) pemboleh ubah dimanipulasikan,
(ii) pemboleh ubah bergerak balas.State
(i) the manipulated variable,
(ii) the responding variable.

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• (i) The distance from the bell [1 mark]1
• (ii) The sound level (reading of the meter) [1 mark]1

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[1 markmarkah] (e)Nyatakan kesimpulan penyiasatan ini.State the conclusion of this investigation.

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• The further the distance from the bell, the lower the sound level / the quieter the sound1

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[2 marksmarkah] (f)Bunyi yang lebih daripada 85 dB boleh merosakkan pendengaran. Pada jarak yang manakah Hafiz perlu memakai pelindung telinga? Beri satu sebab.Sound of more than 85 dB can damage hearing. At which distance should Hafiz wear ear protectors? Give a reason.

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• 1 m [1 mark]1
• The sound level (90 dB) is more than 85 dB, which can damage hearing [1 mark]1

Tick each point you got.Tandakan setiap isi yang betul.

For the teacherUntuk guru: ApplyingMengaplikasi, lowrendah difficultyaras lowrendah, Unit 6, standard 6.1.4

TextbookBuku teks p.ms. 118

14

QuestionSoalan 14

Mei Lan menyiasat empat haiwan vertebrata, W, X, Y dan Z. Jadual 2 menunjukkan ciri-ciri haiwan itu.

Haiwan	Penutup badan	Pembiakan	Organ pernafasan	Habitat
W	Sisik	Bertelur	Insang	Di dalam air
X	Kulit lembap	Bertelur	Peparu dan kulit lembap	Di darat dan di dalam air
Y	Bulu pelepah	Bertelur	Peparu	Di darat
Z	Bulu halus	Melahirkan anak	Peparu	Di darat

Mei Lan studies four vertebrates, W, X, Y and Z. Table 2 shows the characteristics of the animals.

Animal	Body covering	Reproduction	Breathing organ	Habitat
W	Scales	Lays eggs	Gills	In water
X	Moist skin	Lays eggs	Lungs and moist skin	On land and in water
Y	Feathers	Lays eggs	Lungs	On land
Z	Fine hair	Gives birth	Lungs	On land

[1 markmarkah] (a)Haiwan manakah ialah amfibia?Which animal is an amphibian?

AWBXCYDZ

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X

An amphibian has moist skin, lays eggs and breathes with lungs and moist skin.

[1 markmarkah] (b)Namakan kelas haiwan W.Name the class of animal W.

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• Fish1

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[2 marksmarkah] (c)Mengapakah haiwan X boleh hidup di darat dan di dalam air?Why can animal X live on land and in water?

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• It has two breathing organs [1 mark]1
• Lungs to breathe on land and moist skin to breathe in water [1 mark]1

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[2 marksmarkah] (d)Haiwan W dikeluarkan daripada air dan diletakkan di darat. Ramalkan apa yang berlaku kepada haiwan W dan terangkan jawapan anda.Animal W is taken out of water and put on land. Predict what happens to animal W and explain your answer.

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• It cannot breathe / it will die [1 mark]1
• It breathes only with gills, which work in water / it has no lungs [1 mark]1

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[1 markmarkah] (e)Namakan dua haiwan yang bernafas dengan peparu sahaja.Name the two animals that breathe with lungs only.

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• Y and Z (both needed)1

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[1 markmarkah] (f)Seekor ikan paus hidup di dalam air seperti haiwan W, tetapi ikan paus tergolong dalam kelas yang sama dengan haiwan Z. Beri satu sebab.A whale lives in water like animal W but belongs to the same class as animal Z. Give one reason.

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• It gives birth / it breathes with lungs / it has fine hair1

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For the teacherUntuk guru: AnalysingMenganalisis, mediumsederhana difficultyaras mediumsederhana, Unit 3, standard 3.2.3

TextbookBuku teks p.ms. 60

15

QuestionSoalan 15

Jadual 3 menunjukkan perubahan tenaga dalam tiga peralatan di rumah Aina.

Peralatan	Rantaian tenaga
Cerek elektrik	Tenaga elektrik → (i) ______
Lampu meja	Tenaga elektrik → (ii) ______ + tenaga haba
Kereta mainan	Tenaga kimia (bateri) → tenaga elektrik → (iii) ______

Table 3 shows the energy changes in three appliances in Aina's home.

Appliance	Energy chain
Electric kettle	Electrical energy → (i) ______
Table lamp	Electrical energy → (ii) ______ + heat energy
Toy car	Chemical energy (battery) → electrical energy → (iii) ______

[3 marksmarkah] (a)Tulis bentuk tenaga (i), (ii) dan (iii) dalam Jadual 3.Write the forms of energy (i), (ii) and (iii) in Table 3.

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• (i) Heat energy [1 mark]1
• (ii) Light energy [1 mark]1
• (iii) Kinetic energy [1 mark]1

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[1 markmarkah] (b)Sebahagian tenaga elektrik dalam lampu meja menjadi tenaga haba. Adakah tenaga haba itu musnah?Some of the electrical energy in the table lamp becomes heat energy. Is the heat energy destroyed?

AYaYesBTidakNo

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No

Energy cannot be destroyed. It changes to other forms and spreads into the surroundings.

[2 marksmarkah] (c)Sebuah turbin angin di sekolah Aina menjana elektrik untuk lampu padang. Adakah tenaga angin sumber tenaga boleh dibaharui atau tidak boleh dibaharui? Terangkan jawapan anda.A wind turbine at Aina's school generates electricity for the field lights. Is wind energy a renewable or a non-renewable source? Explain your answer.

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• Renewable [1 mark]1
• Wind can be replaced naturally / does not run out [1 mark]1

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[2 marksmarkah] (d)Pengawas Aina selalu terlupa mematikan lampu dan kipas apabila bilik darjah kosong. Cadangkan satu cara menjimatkan elektrik dan beri satu sebab mengapa hal ini penting.Aina's class monitors often forget to switch off the lights and fans when the classroom is empty. Suggest one way to save electricity and give one reason why it is important.

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• Switch off the lights and fans when nobody is in the room [1 mark]1
• Less electricity is used, so fossil fuels (non-renewable) last longer / the electricity bill is lower [1 mark]1

Tick each point you got.Tandakan setiap isi yang betul.

For the teacherUntuk guru: ApplyingMengaplikasi, lowrendah difficultyaras lowrendah, Unit 7, standard 7.1.4

TextbookBuku teks p.ms. 128

16

QuestionSoalan 16

Farah menggunakan sekeping papan sebagai tuas untuk mengangkat sebuah balang pasir. Dia meletakkan fulkrum pada tiga jarak, X, daripada balang itu. Dia menambah pemberat 50 g pada hujung papan yang satu lagi sehingga balang itu terangkat. Rajah 3 menunjukkan susunan alat dan Jadual 4 menunjukkan keputusannya.

Jarak X antara fulkrum dengan balang	35 cm	25 cm	15 cm
Bilangan pemberat 50 g yang diperlukan	7	5	3

Farah uses a plank as a lever to lift a jar of sand. She puts the fulcrum at three distances, X, from the jar. She adds 50 g weights to the other end of the plank until the jar lifts. Diagram 3 shows the set-up and Table 4 shows her results.

Distance X between the fulcrum and the jar	35 cm	25 cm	15 cm
Number of 50 g weights needed	7	5	3

[2 marksmarkah] (a)Namakan
(i) P,
(ii) Q.
beban   fulkrum   dayaName
(i) P,
(ii) Q.
load, fulcrum, force

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• (i) P: load [1 mark]1
• (ii) Q: fulcrum [1 mark]1

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[2 marksmarkah] (b)Nyatakan pemboleh ubah dimanipulasikan dan pemboleh ubah bergerak balas.State the manipulated variable and the responding variable.

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• Manipulated: the distance X between the fulcrum and the jar [1 mark]1
• Responding: the number of weights needed to lift the jar [1 mark]1

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[1 markmarkah] (c)Nyatakan kesimpulan penyiasatan ini.State the conclusion of this investigation.

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• The nearer the fulcrum is to the jar (load), the fewer weights (the less force) are needed to lift it1

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[1 markmarkah] (d)Ramalkan bilangan pemberat yang diperlukan jika X ialah 5 cm.Predict the number of weights needed if X is 5 cm.

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• 1 weight (the number falls by 2 for every 10 cm: 3 − 2 = 1)1

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[2 marksmarkah] (e)Farah hanya mempunyai dua pemberat 50 g. Pada jarak X yang manakah dia perlu meletakkan fulkrum untuk mengangkat balang itu? Beri satu sebab.Farah has only two 50 g weights. At which distance X should she place the fulcrum to lift the jar? Give a reason.

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• 10 cm or less than 10 cm [1 mark]1
• The number of weights falls by 2 for every 10 cm, so 3 weights at 15 cm becomes 2 weights at 10 cm [1 mark]1

Tick each point you got.Tandakan setiap isi yang betul.

For the teacherUntuk guru: AnalysingMenganalisis, hightinggi difficultyaras hightinggi, Unit 10, standard 10.1.3

TextbookBuku teks p.ms. 171

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