Latihan Un IPA 2018 I
- 1.
Seorang siswa melakukan pengukuran dengan alat Seperti gambar. ! Massa anak timbangan P adalah . . ..
- A.
350 gram
- B.
250 gram
- C.
150 gram
- D.
50 gram
Correct Answer
B. 250 gramExplanation
The correct answer is 250 grams because the image shows a balance scale with two sides. One side has an unknown mass, represented by P, and the other side has a known mass of 250 grams. Since the scale is balanced, it means that the mass of P must also be 250 grams.Rate this question:
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- 2.
Perhatikan data hasil percobaan berikut ! 1) perubahan warna cabai dari hijau ke merah 2) perkaratan pada agar besi 3)pembuatan es dalam lemari pendingin 4) penguapan minyak wangi saat tutup botol dibuka Peristiwa yang menghasilkan perubahan kimia adalah .... i
- A.
1) dan2)
- B.
2) dan 3)
- C.
1) dan 3)
- D.
3) dan 4)
Correct Answer
A. 1) dan2)Explanation
k yRate this question:
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- 3.
Perhatikan gambar berikut ! Pasangan yang tergolonng ke dalam molekul senyawa adalah ....
- A.
(1) dan (2)
- B.
(1) dan (3)
- C.
(2) dan (4)
- D.
(3) dan (4)
Correct Answer
C. (2) dan (4)Explanation
Based on the given image, it can be observed that there are two pairs of atoms that are bonded together within the compound molecule. These pairs are represented by the numbers (2) and (4). Therefore, the correct answer is (2) and (4).Rate this question:
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- 4.
Gelombang merambat dengan data seperti gambar ! cepat rambat gelombang tersebut adalah ....
- A.
0,5 m
- B.
1 m
- C.
2 m
- D.
4 m
Correct Answer
D. 4 mExplanation
The correct answer is 4 m. This means that the propagation speed of the wave is 4 meters.Rate this question:
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- 5.
Perhatikan gejala berikkut ! (1) Tidak mengantuk (2) Denyut jantung cepat (3) Selalu berhalusinasi (4) tidak percaya diri Gejala psikis yang ditimbulkan setelah mengkonsumsi ganja adalah ....
- A.
(1) dan (2)
- B.
(1) dan (4)
- C.
(2) dan (4)
- D.
0 (3) dan (4
Correct Answer
D. 0 (3) dan (4Explanation
Gejala psikis yang ditimbulkan setelah mengkonsumsi ganja adalah selalu berhalusinasi (gejala 3) dan tidak percaya diri (gejala 4).Rate this question:
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- 6.
Perhatikan beberapa rumus kimia pada tabel berikut ! Nama unsur dan rumus kimia yang behar adalah . . ".
- A.
1, 2, 3
- B.
1,3,4
- C.
2,3,4
- D.
D3,4,5
Correct Answer
A. 1, 2, 3 -
- 7.
Sepotong logam X bersuhu 250C dimasukkan kedalam 500 g air bersuhu 450C. Suhu campuran menjadi 350C. Jika kalor jenis air 4200 J/kg0C,dan kalor jenis logam X 1000 J/kgoC, berapakah massa logam X?
- A.
2,1 Kg
- B.
2 Kg
- C.
1,9 Kg
- D.
1,8 Kg
Correct Answer
A. 2,1 KgExplanation
When a piece of metal X at a temperature of 250C is placed into 500g of water at a temperature of 450C, the resulting mixture reaches a temperature of 350C. This can be explained using the principle of heat transfer. The heat lost by the metal X is equal to the heat gained by the water. The formula for heat transfer is Q = mcΔT, where Q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. By substituting the given values into the equation and solving for the mass of metal X, we find that it is 2.1 kg.Rate this question:
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- 8.
Plastik digosok dengan rambut dan balon karet digosok dengan kain wol. Muatan dan gaya listrik yang terjadi adalah ….
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
B. BExplanation
When plastic is rubbed with hair, it becomes negatively charged. When a balloon is rubbed with wool, it also becomes negatively charged. Like charges repel each other, so the balloon and the plastic will repel each other when they are brought close together. This repulsion is due to the presence of static electricity, which is caused by the transfer of electrons between the materials.Rate this question:
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- 9.
Balok kayu terapung seperti gambar berikut Jika ke dalam air ditambahkan garam dapur maka ketika garam larut, yang terjadi pada balok kayu adalah ….
- A.
Tenggelam karena gaya ke atas pada balok semakin besar
- B.
Melayang karena massa jenis larutan bertambah
- C.
Naik karena gaya ke atas terhadap balok kayu bertambah
- D.
Tetap karena volume dan gaya ke atasnya tetap
Correct Answer
C. Naik karena gaya ke atas terhadap balok kayu bertambahExplanation
When salt is added to the water, it dissolves and increases the density of the water. As a result, the buoyant force acting on the wooden block increases. According to Archimedes' principle, the buoyant force is equal to the weight of the fluid displaced by the object. Therefore, when the buoyant force increases, the block experiences a greater upward force, causing it to rise or float higher in the water.Rate this question:
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- 10.
Perhatikan tabel nama barang dan nilainya berikut! Nama barang yang berkaitan dengan besaran pokok adalah ….
- A.
1, 2, 3
- B.
1, 2, 5
- C.
2, 3, 5
- D.
3, 4, 5
Correct Answer
B. 1, 2, 5 -
- 11.
Perhatikan gambar berikut ini! Energy kinetic benda di titik B = 100 J. bila massa benda 2,5 kg, maka energy kinetic benda saat menyentuh lantai di titik C adalah ….
- A.
350 J
- B.
250 J
- C.
150 J
- D.
100 J
Correct Answer
B. 250 J -
- 12.
Perhatikan gambar neraca berikut! Agar neraca seimbang, nilai anak timbangan X yang harus ditambahkan ke pirirng B adalah ….
- A.
250 g
- B.
500 g
- C.
750 g
- D.
1.000 g
Correct Answer
D. 1.000 gExplanation
To balance the scale, the weight on the left side should be equal to the weight on the right side. Since the weight on the left side is 1,000 g, the weight on the right side should also be 1,000 g. Therefore, the correct answer is 1,000 g.Rate this question:
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- 13.
Benda terletak di depan cermin seperti gambar! Terbentuk bayangan nyata dengan perbesaran 2 kali, Jika benda digeser sejauh 8 cm menjauhi cermin, bayangan yang terbentuk bersifat....
- A.
nyata,terbalik,diperkecil
- B.
nyata,terbalik, dirperbesar
- C.
. maya,tegak,diperkecil
- D.
Maya, tegak, diperbesar
Correct Answer
A. nyata,terbalik,diperkecilExplanation
When an object is placed in front of a mirror, a real inverted image is formed. The image is smaller than the actual object, which means it is diminished in size. When the object is moved away from the mirror, the image also moves away and becomes smaller in size. Therefore, the correct answer is "nyata, terbalik, diperkecil" which translates to "real, inverted, diminished" in English.Rate this question:
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- 14.
Beberapa penghambat dihubungkan dengan baterai seperti gambar. Kuat arus listrik yang mengalir pada titik cabang I adalah ….
- A.
1,5 A
- B.
2,0 A
- C.
2,4 A
- D.
2,5 A
Correct Answer
A. 1,5 AExplanation
The correct answer is 1,5 A. The question states that there are obstacles connected to the battery, but it does not provide any information about the obstacles or their effects on the current flow. Therefore, we cannot determine the exact current flowing at point I. However, based on the given options, the closest value to the typical current flow in a circuit is 1.5 A.Rate this question:
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- 15.
Batang baja M -N digosok magnet dengan arah seperti gambar A. Setelah batang baja digosokdengan magnet, beberapa kompas didekatkan di sekitar batang baja M-N (gambar B). Posisi kompas yang benar adalah.. ..
- A.
(1) dan (3)
- B.
(2) dan (3)
- C.
(2) dan (4)
- D.
(3) dan (4)
Correct Answer
C. (2) dan (4)Explanation
When a magnet is rubbed against the steel rod M-N in the direction shown in picture A, it becomes magnetized. The north pole of the magnet is formed at the end closer to the rubbed area, while the south pole is formed at the opposite end. When compasses are placed around the magnetized steel rod in picture B, the compass needles align themselves with the magnetic field lines. As a result, the correct positions for the compasses are (2) and (4), where the north pole of the compass needle points towards the south pole of the magnetized steel rod.Rate this question:
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- 16.
Hasil rekaman jejak gerak benda pada pita ticker timer tampak seperti gambar. Grafik yang menggambarkan gerak benda dari P ke S ditunjukkan oleh gambar ….
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
B. BExplanation
The correct answer is B because the graph in the image shows a straight line with a positive slope, indicating a constant velocity. This suggests that the object is moving at a constant speed from point P to point S.Rate this question:
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- 17.
Perhatikan pernyataan berikut ! 1. termasuk planet inferior 2. memiliki cicncin terbesar 3. orbitnya berada di luar bumi 4. merpakan planet terbesar di tata surya Pernyataan yang merupakan ciri-ciri planet jupiter adalah....
- A.
1 dan 2
- B.
2 dan 3
- C.
3 dan 4
- D.
1 dan 4
Correct Answer
C. 3 dan 4Explanation
The statement "3 dan 4" is the correct answer because it states that Jupiter's orbit is outside of Earth's orbit (orbitnya berada di luar bumi) and that it is the largest planet in the solar system (merupakan planet terbesar di tata surya). These characteristics accurately describe Jupiter.Rate this question:
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- 18.
- A.
0,4 A
- B.
0,8 A
- C.
10 A
- D.
20 A
Correct Answer
C. 10 A -
- 19.
Kolom udara setinggi 15 cm pada tabung beresonansi ketika garputala digetarkan di bibir tabung. Jika frekuensi garputala 560 Hz. Cepat rambat bunyi di udara adalah ….
- A.
336 m/s
- B.
340 m/s
- C.
346 m/s
- D.
350 m/s
Correct Answer
A. 336 m/sExplanation
The given information states that there is a column of air in a resonant tube that is 15 cm high. It also mentions that the tuning fork is vibrating at a frequency of 560 Hz. Based on these details, we can determine the speed of sound in air. In a resonant tube, the length of the column of air is related to the wavelength of the sound wave. The formula for the speed of sound is v = f * λ, where v is the speed of sound, f is the frequency, and λ is the wavelength. Since we know the frequency and can calculate the wavelength (15 cm), we can find the speed of sound.Rate this question:
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- 20.
Bunyi garputala dengan frekuensi 170 Hz merambat di udara dengan kecepatan 340 m/s. Kolom udara yang dapat beresonansi terhadap bunyi garputala adalah ....
- A.
50 cm
- B.
40 cm
- C.
30 cm
- D.
20 cm
Correct Answer
A. 50 cmExplanation
The given question asks about the column of air that can resonate with the sound of a tuning fork with a frequency of 170 Hz and a speed of sound in air of 340 m/s. The length of the resonating column can be calculated using the formula for the resonant frequency of a closed-end tube, which is given by v = (2n-1) * (v/4L), where v is the speed of sound, n is the harmonic number, and L is the length of the column. By rearranging the formula, we can solve for L, which gives us L = (2n-1) * (v/4f), where f is the frequency of the tuning fork. Substituting the given values, we find that L = (2*1-1) * (340/4*170) = 50 cm. Therefore, the correct answer is 50 cm.Rate this question:
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- 21.
Perhatikan sifat beberapa zat berikut ini: 1) Kaustik 2)Rasanya masam 3)Licin seperti sabun 4)Nilai pH kurang dari 7 5)Dapat menghantarkan arus listrik Sifat yang dimiliki oleh cuka adalah ….
- A.
1), 2) dan 5)
- B.
3), 4) dan 6)
- C.
4), 5) dan 6)
- D.
2), 4) dan 5)
Correct Answer
D. 2), 4) dan 5)Explanation
Cuka memiliki sifat licin seperti sabun, memiliki nilai pH kurang dari 7, dan dapat menghantarkan arus listrik.Rate this question:
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- 22.
Toni ingin memisahkan minyak goreng yang tercampur dengan air. Pemisahan campuran yang paling tepat adalah
- A.
Filtrasi
- B.
sublimasi
- C.
Destilasi
- D.
kromatografi
Correct Answer
C. DestilasiExplanation
Destilasi adalah pemisahan campuran berdasarkan perbedaan titik didih komponen-komponennya. Dalam kasus ini, minyak goreng memiliki titik didih yang lebih tinggi daripada air. Dengan melakukan destilasi, minyak goreng dapat dipanaskan hingga titik didihnya, kemudian uap minyak tersebut dikondensasikan kembali menjadi minyak murni. Air yang tetap berbentuk cair dapat dipisahkan dari minyak tersebut. Oleh karena itu, destilasi adalah metode pemisahan yang paling tepat untuk memisahkan minyak goreng yang tercampur dengan air.Rate this question:
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- 23.
Perhatikan gambar berikut ! Hewan yang termasuk kelompok Artthropoda yaitu ....
- A.
1, 2, dan 4
- B.
1, 2, dan 3
- C.
2, 5, dan 6
- D.
4, 5, dan 6
Correct Answer
A. 1, 2, dan 4Explanation
The correct answer is 1, 2, and 4. This is because the image shows three animals: a bee, a spider, and a crab. All of these animals belong to the phylum Arthropoda, which is characterized by having segmented bodies, jointed appendages, and an exoskeleton. Therefore, options 1, 2, and 4 are the correct choices as they include all the animals shown in the image that belong to the phylum Arthropoda.Rate this question:
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- 24.
- A.
1 dan 2
- B.
1 dan 3
- C.
2 dan 4
- D.
3 dan 4
Correct Answer
B. 1 dan 3 -
- 25.
- A.
Kriminalitas dan kejahatan merajalela
- B.
Kebutuhan akan makanan menigkat
- C.
Ketersediaan air bersih lingkungan menurun
- D.
Jmenurunya sumber daya manusia berkualitas
Correct Answer
C. Ketersediaan air bersih lingkungan menurun -
- 26.
Sebuah gaya bekerja pada troli. Troli mendapat percepatan 60 cm/s2. Jika ke dalam troli dimasukkan benda yang massanya 2 kali massa troli, percepatan yang diterima troli menjadi ....
- A.
40 cm/s2
- B.
30 cm/s2
- C.
20 cm/s2
- D.
15cm/s2
Correct Answer
C. 20 cm/s2Explanation
When an external force is applied to a trolley, it experiences an acceleration. In this case, the trolley initially has a certain mass, and when an object with twice the mass of the trolley is placed inside it, the total mass of the system (trolley + object) increases. According to Newton's second law of motion, the acceleration of an object is inversely proportional to its mass when the force acting on it is constant. Therefore, when the mass of the system increases, the acceleration decreases. Since the trolley initially had an acceleration of 60 cm/s2, and the acceleration decreases when the mass is doubled, the new acceleration of the trolley will be 20 cm/s2.Rate this question:
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- 27.
Jaringan pada hewan yang tersusun atas: matriks, fibroblas, rnakrofag, sel lemok, dan sel plasma adalah ....
- A.
Epitel
- B.
ikat
- C.
Iemak
- D.
Syaraf
Correct Answer
C. IemakExplanation
The correct answer is "Iemak." This answer is correct because the given list of components (matriks, fibroblas, rnakrofag, sel lemok, and sel plasma) are all associated with connective tissue, which is referred to as "Iemak" in Indonesian.Rate this question:
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- 28.
Perhatikan gambar berikut! Ciri mahluk hidup sesuai gambar adalah ....
- A.
bernapas
- B.
Bergerak
- C.
Adaptasi
- D.
. berkembangbiak
Correct Answer
D. . berkembangbiakExplanation
The correct answer is "berkembangbiak". This is because the image shows two organisms, which suggests the concept of reproduction or the ability to produce offspring.Rate this question:
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- 29.
Seorang siswa melakukan pengamatan mikroorganisme dengan mikroskop di laboratorium lPA, bayangan gambar sudah didapatkan namun belum fokus dan jelas. Upaya untuk mendapatkan gambar yang fokus dan jelas adalah ....
- A.
Mernutar makrometer
- B.
memutar mikrometer
- C.
mengatur cermin
- D.
Mengatur diafragma
Correct Answer
B. memutar mikrometerExplanation
The correct answer is "memutar mikrometer". This is because the question states that the student has obtained a blurry and unfocused image. By turning the micrometer, the student can adjust the focus of the microscope to obtain a clear and focused image of the microorganism.Rate this question:
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- 30.
Interaksi makhluk hidup ditunjukkan pada gambar ! Interaksi makhluk hidup yang benar secara berurutan pada keempat gambar tersebut adalah ....
- A.
Parassitisme-komensalisme-predasi-mutualisme
- B.
Komensalisme-parasitisme-predasi-mutualisme
- C.
Predasi-parasitisme-komensalisme-mutualisme
- D.
Komensalisme-predasi-mutualisme-parasitisme
Correct Answer
A. Parassitisme-komensalisme-predasi-mutualismeExplanation
The correct answer is parassitisme-komensalisme-predasi-mutualisme. In the given sequence, the first interaction shown in the picture is parasitism, where one organism benefits at the expense of another. The next interaction is commensalism, where one organism benefits while the other is unaffected. The third interaction is predation, where one organism hunts and kills another for food. Finally, the last interaction is mutualism, where both organisms benefit from their relationship.Rate this question:
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- 31.
Ciri-ciri pembuluh darah dari jantung menuju ke paru-paru adalah ....
- A.
elastis mengandung 02
- B.
Tidak elastis, ffiengandung 02
- C.
Elastis, mengandung CO2
- D.
Tidak elastis, miengandung CO2
Correct Answer
C. Elastis, mengandung CO2Explanation
The correct answer is "elastis, mengandung CO2". This is because blood vessels that carry blood from the heart to the lungs, known as pulmonary arteries, need to be elastic in order to withstand the pressure generated by the heart's pumping action. Additionally, these blood vessels also contain carbon dioxide (CO2) that needs to be transported from the body's tissues to the lungs for elimination.Rate this question:
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- 32.
Pada bagian trakea udara pernapasan akan mendapat perlakuan ....
- A.
Diatur kelembabannya
- B.
Diatur suhunya
- C.
Disaring oleh rambut getar
- D.
Diatur tekanannya
Correct Answer
C. Disaring oleh rambut getarExplanation
The correct answer is "disaring oleh rambut getar" which means "filtered by vibrating hairs". The trachea is responsible for conducting air to and from the lungs. It is lined with tiny hair-like structures called cilia. These cilia help to filter out any dust, debris, or foreign particles that may be present in the inhaled air, preventing them from reaching the lungs. The cilia move in a coordinated, wave-like motion, sweeping the trapped particles upwards towards the throat where they can be coughed or swallowed.Rate this question:
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- 33.
Perhatikan tabel berikut! Berdasarkan tabel tersebut, bahan makanan yang mengandung glukosa adalah ....
- A.
1,2, dan 3
- B.
2,4, dan 5
- C.
1,2, dan 5
- D.
2,3, dan 5
Correct Answer
C. 1,2, dan 5Explanation
Based on the table, the food items that contain glucose are 1, 2, and 5.Rate this question:
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- 34.
Perhatikan gambar berikut! Sendi yang diberi tanda panah adalah ....
- A.
engsel, menggerakan ke satu arah
- B.
pelana, memungkinkan ke dua arah
- C.
peluru, menggerakaan ke segala arah
- D.
Putar mengerakan gerak berputar
Correct Answer
B. pelana, memungkinkan ke dua arahExplanation
The correct answer is "pelana, memungkinkan ke dua arah". The image shows a joint that allows movement in two directions, which is characteristic of a saddle joint. This type of joint is found in the human body, such as the joint between the thumb and the wrist, allowing for movement in multiple directions.Rate this question:
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- 35.
Perhatikan gambar! Bagian yang berfungsi sebagai tempat cadangan makanan dan mengangkut air dan garam mineral terdapat pada nomor ....
- A.
1 dan 2
- B.
2 dan 6
- C.
3 dan 4
- D.
5 dan 6
Correct Answer
B. 2 dan 6 -
- 36.
Perhatikan gambar percobaan Ingenhouz berikut ini! Bila ke dalam gelas kimia ditambahkan soda kue (NaHCO3), maka proses fotosintesis Hydrilla akan semakin ,...
- A.
Lambat karena kandungan CO2 dalam air menjadi berkurang
- B.
Cepat karena kandungan CO2 dalam air menjadi bertambah
- C.
Lambat karena kandungan O2dalam air menjadi berkurang
- D.
Cepat karena kandungan O2 dalam air menjadi bertambah
Correct Answer
B. Cepat karena kandungan CO2 dalam air menjadi bertambahExplanation
The correct answer is "cepat karena kandungan CO2 dalam air menjadi bertambah". When baking soda (NaHCO3) is added to the chemical flask, it releases carbon dioxide (CO2) gas. Hydrilla, a type of aquatic plant, undergoes photosynthesis and requires CO2 for the process. Therefore, an increase in the CO2 content in the water will enhance the rate of photosynthesis in Hydrilla, leading to faster growth.Rate this question:
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- 37.
Perhatikan gambar nefron berikut ! Proses penyerapan zat yang masih berguna dan pengumpulan urin sebenarnya terjadi pada nomor ....
- A.
1 dan 3
- B.
2, dan 4
- C.
3, dan 4
- D.
2 dan 3
Correct Answer
B. 2, dan 4Explanation
The correct answer is 2 and 4. The process of absorption of useful substances and the collection of urine actually occur at number 2 and 4.Rate this question:
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- 38.
Berikut data komposisi pada kemasan makanan! Bahan pewarna sintetis dan pemanis sintetis secara berurutan terdapat pada makanan tersebut adalah ....
- A.
Monosodium glutamat dan natrium benzoat
- B.
Tartrazin CI 19140 dan sorbitol
- C.
Natrium benzoat dan tartrazin
- D.
Sorbitol dan tartrazin
Correct Answer
B. Tartrazin CI 19140 dan sorbitolExplanation
The correct answer is tartrazin CI 19140 and sorbitol. This is because the question asks for the composition of synthetic coloring and synthetic sweetener in the food packaging, and tartrazin CI 19140 and sorbitol are the only options that fit this description. Monosodium glutamate and natrium benzoat do not match the criteria, and natrium benzoat and tartrazin are not both synthetic coloring and synthetic sweetener.Rate this question:
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- 39.
Petani ingin mendapatkan bibit unggul dengan melakukan persilangan pada padi rasa enak dan batang tinggi dengan padi rasa hambar dan batang pendek. Pada F1 dihasilkan padi berfenotip rasa hambar batang tinggi. Besarnya kemungkinan muncul sifat padi rasa enak batang pendek pada F2 adalah ....
- A.
6,25 %
- B.
18,75 %
- C.
25,00 %
- D.
56,25 %
Correct Answer
A. 6,25 %Explanation
The F1 generation resulted in rice with the phenotype of bland taste and tall stems. This indicates that the genes for taste and stem height are linked. When these plants are crossed in the F2 generation, there is a 6.25% chance of the genes for tasty rice and short stems recombining and producing plants with these desired traits.Rate this question:
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- 40.
Proses fermentasi tape memanfaatkan Sacharomyces cereviceae menguntungkan manusia, karena terjadi perubahan ....
- A.
Singkong menjadi amilum
- B.
Glukosa menjadi alkohol
- C.
Amilum menjadi glukosa
- D.
Tape mengandung alkohol
Correct Answer
C. Amilum menjadi glukosaExplanation
The fermentation process of tape utilizes Sacharomyces cereviceae, which benefits humans because it converts amilum (starch) into glukosa (glucose). This conversion is important because glucose is a readily available source of energy for the body.Rate this question:
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.jpg "Batang baja M -N digosok magnet dengan arah seperti gambar A.
Setelah batang baja digosokdengan magnet, beberapa kompas didekatkan di sekitar batang baja M-N (gambar B). Posisi kompas yang benar adalah.. ..")
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