1.
Besaran di bawah ini yang termasuk besaran pokok adalah ........
Correct Answer
D. Panjang, Massa, Waktu
Explanation
The correct answer is Panjang, Massa, Waktu. These three quantities (length, mass, and time) are considered fundamental or base quantities in the International System of Units (SI). They are independent of other quantities and cannot be defined in terms of any other physical quantities. Other quantities such as force, area, volume, and velocity can be derived from these base quantities.
2.
Alat untuk mengukur panjang adalah ........
Correct Answer
B. Mistar
Explanation
A mistar is a tool used to measure length. It is a long, straight, flat object with markings or measurements along its length. By aligning the object with the starting and ending points of what needs to be measured, one can determine the length accurately. A neraca is a balance scale used to measure weight, not length. A stopwatch is used to measure time, not length. A timbangan is also used to measure weight, not length.
3.
Suatu logam aluminium mempunyai massa 120 gram dan volume 60 cm³ maka massa jenisnya adalah ........
Correct Answer
B. 2 gr/cm³
Explanation
The density of a substance is defined as its mass per unit volume. In this question, the mass of the aluminum is given as 120 grams and the volume is given as 60 cm³. To find the density, we divide the mass by the volume: 120 grams / 60 cm³ = 2 gr/cm³. Therefore, the correct answer is 2 gr/cm³.
4.
Di bawah ini yang termasuk gerak lurus berubah beraturan adalah ........
Correct Answer
A. Buah kelapa yang jatuh dari pohon
Explanation
The correct answer is "buah kelapa yang jatuh dari pohon" because it follows a straight path as it falls from the tree, and its speed increases uniformly due to the force of gravity.
5.
Perhatikan gambar berikut!Udin dan Ucup sedang tarik tambang dengan arah yang berlawanan. Jika gaya Umar 25 Ndan gaya Amir 20 N, maka resultan kedua gayanya adalah ........
Correct Answer
A. 5 N
Explanation
The resultan of the two forces can be found by subtracting the smaller force from the larger force. In this case, since Umar's force is 25 N and Amir's force is 20 N, the resultan is 25 N - 20 N = 5 N.
6.
Perhatikan gambar!
Besarnya usaha yang dikerjakan pada balok adalah ........
Correct Answer
D. 48 Joule
Explanation
The correct answer is 48 Joule because the work done on an object is calculated by multiplying the force applied to the object by the distance the object moves in the direction of the force. From the given image, it can be observed that the force applied on the block is larger and the distance it moves is also larger compared to the other options. Therefore, the work done on the block is the highest, which is 48 Joule.
7.
Tekanan yang terbesar ditunjukkan oleh gambar ........
Correct Answer
A. A
Explanation
The largest pressure is indicated by image A.
8.
Perhatikan pada gambar berikut!
Jika luas penampang A1= 0,001 m dan A2= 0,1 m, maka besar gaya tekanan di A2 adalah ........
Correct Answer
C. 10.000 N
9.
Air massanya 5 g dipanaskan dari 10°C sampai 40°C. Jika kalor jenis air 1 Kal/ gr°C,banyaknya kalor yang diperlukan untuk suhu air adalah ........
Correct Answer
B. 150 Kalori
Explanation
The specific heat capacity of water is 1 calorie/gram°C. To calculate the amount of heat required to raise the temperature of 5 grams of water from 10°C to 40°C, we can use the formula Q = mcΔT, where Q is the amount of heat, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Plugging in the values, we get Q = 5g * 1 cal/g°C * (40°C - 10°C) = 5g * 1 cal/g°C * 30°C = 150 calories. Therefore, the correct answer is 150 Kalori.
10.
Bahan penghantar yang paling baik adalah ........
Correct Answer
A. Alumunium
Explanation
Aluminium is the best conductor of electricity among the given options. It has a high electrical conductivity and is widely used in electrical wiring and transmission lines due to its ability to efficiently carry electrical current. Aluminium also has other desirable properties such as being lightweight, corrosion-resistant, and cost-effective, making it a preferred choice for electrical applications.
11.
Perhatikan gambar di bawah ini!
Satu getaran penuh adalah .......
Correct Answer
C. H - I - H - G – H
Explanation
The correct answer is H - I - H - G - H. This sequence represents one full vibration or oscillation. The pattern starts with H, then moves to I, then back to H, then to G, and finally back to H, completing one full cycle of vibration.
12.
Perhatikan gambar berikut!
Satuan panjang gelombang adalah ........
Correct Answer
C. c – g
Explanation
The correct answer is c - g. In the given image, there are two points labeled as c and g. These points represent two consecutive peaks or troughs of a wave. The distance between these two points is the wavelength, which is a measure of the length of one complete cycle of the wave. Therefore, the correct answer is c - g as it represents the unit of wavelength.
13.
Bunyi yang frekuensinya teratur disebut ........
Correct Answer
C. Nada
Explanation
Bunyi yang frekuensinya teratur disebut "nada" karena nada mengacu pada tinggi rendahnya suara yang dihasilkan oleh suatu benda atau sumber bunyi. Bunyi dengan frekuensi yang teratur atau berulang-ulang dalam pola tertentu akan menghasilkan suara yang memiliki tinggi rendah yang teratur pula, yang kemudian dapat diidentifikasi sebagai nada.
14.
Sifat bayangan yang dibentuk oleh cermin datar adalah .........
Correct Answer
A. tegak, sama besar
Explanation
The correct answer is "tegak, sama besar". When an object is placed in front of a flat mirror, the image formed is virtual, erect (tegak), and the same size (sama besar) as the object. This is because a flat mirror reflects light rays without any distortion, resulting in an image that appears behind the mirror and is the same size as the object.
15.
Gerhana bulan terjadi ketika ........
Correct Answer
D. Posisi bumi berada di antara matahari dan bulan pada satu garis lurus
Explanation
The correct answer is "posisi bumi berada di antara matahari dan bulan pada satu garis lurus". This is because a lunar eclipse occurs when the Earth is directly between the Sun and the Moon, causing the Earth's shadow to fall on the Moon.
16.
Plastik yang digosokkan pada rambut akan bermuatan negatif karena ........
Correct Answer
C. Elektron pindah dari rambut ke plastic
Explanation
When plastic is rubbed against hair, electrons are transferred from the hair to the plastic. This transfer of electrons results in the hair becoming negatively charged, while the plastic becomes positively charged. Therefore, the correct answer is "elektron pindah dari rambut ke plastik" (electrons move from hair to plastic).
17.
Sebuah alat mempunyai hambatan 150 Ohm dilalui arus listrik 2 A maka beda potensialnyaadalah ........
Correct Answer
D. 300 Volt
18.
Perhatikan arus listrik berikut ini!
Besarnya I1 adalah .......
Correct Answer
C. 4 A
Explanation
The given question asks for the magnitude of current (I1). The correct answer is 4 A. This means that the magnitude of current flowing in the circuit is 4 Amperes.
19.
Jika dalam 5 menit mengalir 60 Coulomb muatan listrik melalui sepotong kawatpenghantar, maka kuat arus listriknya adalah ........
Correct Answer
A. 0,2 Ampere
Explanation
The given information states that 60 Coulombs of electric charge flows through a wire in 5 minutes. To find the electric current, we need to divide the amount of charge by the time taken. Therefore, the electric current is 60 Coulombs / 5 minutes = 12 Coulombs per minute. To convert this to Amperes, we need to divide by 60 (since 1 Ampere = 1 Coulomb per second). Therefore, the electric current is 12 Coulombs per minute / 60 = 0.2 Amperes.
20.
Bila magnet yang digantung didekati magnet lainnya, manakah gambar yang paling benar........
Correct Answer
B. B
Explanation
The correct answer is B. When a magnet is approached by another magnet, the two magnets will either attract or repel each other, depending on their poles. In the given options, only option B shows the correct representation of two magnets attracting each other. Option A shows two magnets repelling each other, while options C and D show magnets that are not interacting with each other.
21.
Arah garis gaya magnet antara dua kutub magnet adalah ......
Correct Answer
A. A
Explanation
The correct answer is A. The explanation for this is that the direction of the magnetic field lines between two magnetic poles is from the north pole to the south pole. This is because magnetic field lines always form closed loops, and they always flow from the north pole of a magnet to the south pole. Therefore, option A is the correct answer.
22.
Beberapa faktor yang mempengaruhi besarnya ggl induksi elektromagnetik :
-
Jumlah lilitan kawat pada kumparan
-
Arah garis gaya magnet dalam kumparan
-
Kecepatan gerak magnet atau kumparan
-
Arah lilitan kawat pada kumparan
Pernyataan yang benar adalah nomor ........
Correct Answer
A. 1 dan 3
Explanation
The correct answer is 1 and 3. The number of wire turns in a coil and the speed of motion of the magnet or coil are factors that affect the magnitude of electromagnetic induction.
23.
Ciri dari trafo step-up adalah ........
Correct Answer
C. Tegangan primer lebih kecil daripada tegangan sekunder
Explanation
The correct answer is "tegangan primer lebih kecil daripada tegangan sekunder" (the primary voltage is smaller than the secondary voltage). This is because a step-up transformer is designed to increase the voltage from the primary side to the secondary side. In a step-up transformer, the number of turns in the secondary coil is greater than the number of turns in the primary coil, resulting in a higher voltage output. Therefore, the primary voltage is smaller than the secondary voltage.
24.
Salah satu ciri makhluk hidup yang berfungsi untuk mencegah kepunahan adalah ........
Correct Answer
D. Berkembang biak
Explanation
Berkembang biak adalah salah satu ciri makhluk hidup yang berfungsi untuk mencegah kepunahan. Proses berkembang biak memungkinkan makhluk hidup untuk menghasilkan keturunan baru, yang memastikan kelangsungan hidup spesies tersebut. Dengan berkembang biak, makhluk hidup dapat memperbanyak populasi mereka dan menggantikan individu yang mati atau punah.
25.
Kumpulan dari jaringan yang mempunyai fungsi yang sama akan membentuk ........
Correct Answer
B. Organ
Explanation
A collection of networks with similar functions will form an organ.
26.
Tumbuhan yang mempunyai bunga dan biji adalah ........
Correct Answer
A. Spermatophyte
Explanation
The correct answer is spermatophyte because spermatophytes are plants that have flowers and seeds. This group includes all flowering plants and gymnosperms. Pteridophyta refers to ferns and their allies, which do not have flowers or seeds. Bryophytes are non-vascular plants such as mosses and liverworts, which also do not have flowers or seeds. Tallophyta is not a recognized plant classification.
27.
Ikan remora yang menempel pada ikan hiu merupakan contoh simbiosis ........
Correct Answer
A. Komensalisme
Explanation
The correct answer is komensalisme. Komensalisme adalah hubungan simbiosis di mana satu organisme mendapatkan manfaat tanpa memberikan manfaat atau merugikan organisme lain. Dalam contoh ini, ikan remora yang menempel pada ikan hiu mendapatkan manfaat dari naungan dan perlindungan yang diberikan oleh ikan hiu tanpa memberikan manfaat atau merugikan ikan hiu tersebut.
28.
Jaringan tumbuhan yang berfungsi mengangkut air dan garam mineral dari akar ke daunadalah ........
Correct Answer
D. xylem
Explanation
The correct answer is xylem. Xylem is a plant tissue responsible for transporting water and minerals from the roots to the leaves. It is composed of specialized cells called tracheids and vessel elements, which form long tubes that allow for efficient water movement. The xylem also provides structural support to the plant.
29.
Perhatikan bagan jaring-jaring makanan berikut ini!
Sesuai bagan, label nomor 1 dan 2 adalah ........
Correct Answer
A. tikus dan burung kecil
Explanation
Based on the given food web, label number 1 and 2 represent the relationship between a mouse and a small bird. This can be inferred because in a food web, an arrow pointing from one organism to another indicates that the first organism is being consumed by the second organism. In this case, the arrow from label number 1 (mouse) points towards label number 2 (small bird), indicating that the small bird preys on the mouse. Therefore, the correct answer is "tikus dan burung kecil" (mouse and small bird).
30.
Kelainan pada tulang karena kebiasaan menulis pada meja yang terlalu pendek adalah........
Correct Answer
C. Kifosis
Explanation
Kifosis adalah kelainan pada tulang belakang yang ditandai dengan lengkungan ke depan yang berlebihan. Kebiasaan menulis pada meja yang terlalu pendek dapat menyebabkan postur tubuh yang tidak baik, terutama pada tulang belakang. Hal ini dapat mengakibatkan kifosis, di mana tulang belakang melengkung ke depan secara berlebihan.
31.
Proses perubahan makanan dari ukuran besar menjadi ukuran kecil dengan bantuan gigi disebut pencernaan secara ........
Correct Answer
A. Mekanisme
Explanation
The process of breaking down food from large to small sizes with the help of teeth is known as mechanical digestion. It involves the physical breakdown of food into smaller pieces, making it easier for enzymes to further break down the food chemically during the process of digestion.
32.
Perhatikan gambar paru-paru di bawah ini!
Bagian yang disebut bronkus ditandai oleh nomor ........
Correct Answer
C. 3
Explanation
The bronchus is a part of the respiratory system that connects the trachea to the lungs. In the given image, the number 3 is pointing towards a structure that represents the bronchus. Therefore, the correct answer is 3.
33.
Alat ekskresi yang berfungsi untuk menyaring darah dan mengeluarkan zat sisametabolisme dalam bentuk urine adalah ........
Correct Answer
A. Ginjal
Explanation
The correct answer is ginjal. The kidneys are responsible for filtering the blood and removing waste products in the form of urine. They play a crucial role in maintaining the body's fluid balance, regulating blood pressure, and eliminating toxins from the body. The urethra is the tube that carries urine from the bladder out of the body, while the ureter is the tube that connects the kidneys to the bladder. The liver is involved in many metabolic processes but is not directly responsible for filtering the blood and producing urine.
34.
Perhatikan data berikut ini !
-
syaraf sensoris
-
efektor (otot dan kelenjar)
-
syaraf pusat
-
syaraf motoris
-
sumsum tulang belakang
-
reseptor (alat indera)
Urutan jalannya impuls (rangsang) pada gerak biasa adalah ........
Correct Answer
C. 6 - 1 - 3 - 4 – 2
Explanation
The correct answer is 6 - 1 - 3 - 4 - 2. This is the correct order of the passage of impulses in the normal movement. First, the impulse is received by the receptor (6), then it is transmitted to the sensory nerve (1). From the sensory nerve, the impulse is sent to the central nerve (3) where it is processed. After processing, the impulse is then transmitted to the motor nerve (4) which controls the effectors (muscles and glands). Finally, the impulse reaches the effector (2) and results in the desired movement.
35.
Pengertian adaptasi fisiologi adalah ........
A .
B . *
C .
D .
Correct Answer
B. penyesuaian fungsi alat tubuh makhluk hidup terhadap lingkungannya
Explanation
The correct answer is "penyesuaian fungsi alat tubuh makhluk hidup terhadap lingkungannya". This is because the term "adaptasi fisiologi" refers to the adjustment or modification of the body's functions in response to the environment. It involves changes in the physiological processes and functions of an organism to better suit its surroundings.
36.
Di bawah ini adalah contoh adaptasi tingkah laku ........
Correct Answer
D. Paus sering muncul di permukaan laut untuk bernafas
Explanation
The given options describe different examples of behavioral adaptations in various animals. The correct answer states that whales often surface in order to breathe. This behavior is an adaptation that allows whales to take in oxygen from the air, as they are mammals and need to breathe air to survive. By coming to the surface, whales can inhale and exhale, replenishing their oxygen supply and removing carbon dioxide from their bodies. This behavior is essential for their survival in an aquatic environment.
37.
Perhatikan pernyataan berikut ini :
-
Belalang yang hidup di rumput berwarna hijau dapat bertahan hidup, sedangkanbelalang yang berwarna kuning akan punah dimakan oleh pemangsanya.
-
Daun suatu tumbuhan seluruhnya berwarna hijau karena daun yang berwarna kuningtelah gugur ditiup angin .
-
Kupu-kupu Biston betularia yang hidup di Inggris setelah revolusi industri lebih banyak berwarna hitam karena polusi asap menyamarkan pandangan pemangsanya.
-
Rumput dapat ditemui di mana-mana karena tumbuhan ini mudah menyesuaikan diridengan lingkungannya.
Pernyataan yang sesuai dengan proses seleksi alam adalah ........
Correct Answer
B. 1 dan 3
Explanation
Pernyataan 1 dan 3 sesuai dengan proses seleksi alam. Pada pernyataan 1, belalang yang berwarna hijau dapat bertahan hidup karena mereka dapat menyamarkan diri di antara rumput yang berwarna hijau, sedangkan belalang yang berwarna kuning akan mudah terlihat dan dimakan oleh pemangsanya. Pada pernyataan 3, kupu-kupu Biston betularia yang hidup di Inggris setelah revolusi industri lebih banyak berwarna hitam karena polusi asap menyamarkan pandangan pemangsanya, sehingga kupu-kupu dengan warna yang lebih terang menjadi lebih mudah terlihat dan dimakan oleh pemangsanya.
38.
Pada gambar bunga di atas, bagian yang berfungsi sebagai alat kelamin jantan adalahnomor .......
Correct Answer
B. 2
Explanation
In the given image, number 2 represents the male reproductive organ of the flower. This is known as the stamen, which consists of the filament and anther. The filament holds up the anther, where pollen grains are produced. The male reproductive cells, known as sperm, are contained within the pollen grains. Therefore, number 2 is the correct answer as it represents the part of the flower that functions as the male reproductive organ.
39.
Berikut ini usaha-usaha dalam bidang pertanian :
-
Pemberantasan hama dan penyakit2
-
Pengolahan lahan gambut
-
Pemupukan
-
Penebangan hutan
-
Teknik tumpang sari
Usaha-usaha di atas yang termasuk intensifikasi pertanian adalah ........
Correct Answer
B. 1, 3, dan 5
Explanation
The correct answer is 1, 3, and 5. These options involve efforts related to intensification in agriculture. Pemberantasan hama dan penyakit (eradication of pests and diseases) is a form of intensification as it aims to protect crops from damage. Pemupukan (fertilization) is also a form of intensification as it involves adding nutrients to the soil to enhance plant growth. Teknik tumpang sari (intercropping) is another form of intensification as it involves growing multiple crops in the same field simultaneously to maximize land use. Therefore, options 1, 3, and 5 are the correct choices.
40.
Pemupukan akan meningkatkan hasil panen jika ........
Correct Answer
D. Dalam dosis yang tepat
Explanation
The correct answer is "dalam dosis yang tepat" because fertilization will only increase crop yields if it is used in the right amount. Using too much or too little fertilizer may not have the desired effect on the harvest. Therefore, it is important to use fertilizers in the appropriate dosage to achieve optimal results.