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, namely 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 derived from 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
The correct answer is "mistar". A mistar is a tool used to measure length or distance. It is a long, flat, and narrow ruler-like instrument that typically has markings in centimeters or inches. It is commonly used in various fields such as construction, engineering, and design to accurately measure the length of objects or distances between points.
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 calculated by dividing its mass by its volume. In this case, the mass of the aluminum is given as 120 grams and the volume is given as 60 cm³. By dividing 120 grams by 60 cm³, we get a density of 2 grams per 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 exhibits straight-line motion with constant acceleration due to gravity.
5.
Perhatikan gambar berikut!
Umar dan Amir 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
Umar and Amir are pulling in opposite directions, with Umar exerting a force of 25 N and Amir exerting a force of 20 N. To find the resultant force, we need to subtract the smaller force from the larger force. In this case, 25 N - 20 N = 5 N. Therefore, the resultant force of their combined efforts is 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 equal to the force applied to the object multiplied by the distance over which the force is applied. From the given image, it can be observed that the force applied on the block is 12 N and the distance over which the force is applied is 4 meters. Therefore, the work done is calculated as 12 N x 4 m = 48 Joule.
7.
Tekanan yang terbesar ditunjukkan oleh gambar ........
Correct Answer
A. A
Explanation
The correct answer is A. The explanation for this answer is not available.
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
Explanation
The pressure is defined as the force per unit area. In this case, the force is constant but the area increases from A1 to A2. Since the force is constant and the area increases by a factor of 100, the pressure at A2 will be 100 times smaller than the pressure at A1. Therefore, the correct answer is 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 amount of heat required to heat a substance can be calculated using the formula Q = m * c * ΔT, where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature. In this case, the mass of the water is given as 5 grams, the specific heat capacity of water is 1 Kal/ gr°C, and the change in temperature is 40°C - 10°C = 30°C. Plugging these values into the formula, we get Q = 5 * 1 * 30 = 150 Kalori. Therefore, the correct answer is 150 Kalori.
10.
Bahan penghantar yang paling baik adalah ........
Correct Answer
A. Alumunium
Explanation
Aluminum is the best conductor of heat and electricity among the given options. It has a high thermal and electrical conductivity, making it an ideal choice for conducting heat and electricity efficiently. Aluminum is widely used in various industries such as construction, electronics, and transportation due to its excellent conductivity properties.
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. It starts with H, then goes to I, then back to H, then to G, and finally back to H. Each letter represents a position or state in the vibration, and the sequence shows the order in which these positions or states occur.
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. The question asks for the unit of wavelength, which is the distance between two consecutive points on a wave. Therefore, the correct answer is c - g as it represents the distance between these two points on the wave.
13.
Bunyi yang frekuensinya teratur disebut ........
Correct Answer
C. Nada
Explanation
Bunyi yang frekuensinya teratur disebut "nada" karena frekuensi bunyi yang teratur menghasilkan pola getaran yang berulang secara teratur. Nada mengacu pada tinggi rendahnya suara yang disebabkan oleh frekuensi getaran suara. Dalam konteks ini, desah, dentum, dan gaung tidak menggambarkan frekuensi yang teratur seperti yang dijelaskan dalam pertanyaan.
14.
Sifat bayangan yang dibentuk oleh cermin datar adalah .........
Correct Answer
A. tegak, sama besar
Explanation
The correct answer is "tegak, sama besar." When a flat mirror is used, the image formed is upright (tegak) and has the same size (sama besar) as the object being reflected. This is because the light rays reflecting off the mirror maintain their original direction and do not converge or diverge.
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 positioned directly between the Sun and the Moon, causing the Earth's shadow to fall on the Moon. In this alignment, the Moon is in the Earth's shadow, resulting in a lunar eclipse.
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 causes the plastic to become negatively charged while the hair 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, denoted as I1. The correct answer is 4 A, which means that the magnitude of the current 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 question states that 60 Coulombs of electric charge flow through a wire in 5 minutes. To find the electric current, we can use the formula:
Current (I) = Charge (Q) / Time (t)
Substituting the given values, we get:
I = 60 Coulombs / 5 minutes = 12 Coulombs/minute
Since 1 Ampere is equal to 1 Coulomb/second, we need to convert minutes to seconds:
12 Coulombs/minute = 12 Coulombs/60 seconds = 0.2 Ampere
Thus, the correct answer is 0.2 Ampere.
20.
Bila magnet yang digantung didekati magnet lainnya, manakah gambar yang paling benar........
Correct Answer
B. B
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 magnet poles is from the north pole to the south pole. This means that the magnetic field lines follow a specific path or direction, which is from the north pole of one magnet to the south pole of the other magnet.
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 because the number of wire turns in a coil and the speed of the magnet or coil's movement 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" which means that the primary voltage is smaller than the secondary voltage. This is a characteristic of a step-up transformer, which is designed to increase voltage levels. 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 an increase in 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. Dengan berkembang biak, makhluk hidup dapat menghasilkan keturunan baru dan memperluas populasi mereka. Hal ini penting dalam menjaga kelangsungan hidup suatu spesies, karena jika suatu spesies tidak mampu berkembang biak, maka populasi mereka akan semakin berkurang dan dapat mengarah pada kepunahan.
25.
Kumpulan dari jaringan yang mempunyai fungsi yang sama akan membentuk ........
Correct Answer
B. Organ
Explanation
A group of networks that have the same function will form an organ.
26.
Tumbuhan yang mempunyai bunga dan biji adalah ........
Correct Answer
A. Spermatophyte
Explanation
Spermatophyte is the correct answer because it refers to plants that have flowers and seeds. This term encompasses a wide range of plants, including angiosperms (flowering plants) and gymnosperms (non-flowering plants). These plants have evolved to reproduce through the production of seeds, which are enclosed within fruits or cones. This adaptation allows for more efficient dispersal and protection of offspring. In contrast, pteridophyta refers to ferns and their relatives, which reproduce through spores, while bryophytes and tallophyta refer to non-vascular plants that do not have true flowers or seeds.
27.
Ikan remora yang menempel pada ikan hiu merupakan contoh simbiosis ........
Correct Answer
A. Komensalisme
Explanation
The correct answer is komensalisme. This is a type of symbiosis where one organism benefits while the other is neither harmed nor benefited. In this case, the remora fish benefits by attaching itself to the shark and gaining protection and access to food scraps, while the shark is not affected by the presence of the remora.
28.
Jaringan tumbuhan yang berfungsi mengangkut air dan garam mineral dari akar ke daunadalah ........
Correct Answer
D. xylem
Explanation
Xylem is the correct answer because it is the plant tissue responsible for transporting water and minerals from the roots to the leaves. It consists of specialized cells called tracheids and vessel elements that form long tubes, allowing for the upward movement of water through capillary action. 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, it can be inferred that the labels number 1 and 2 represent the relationship between a mouse and a small bird. This is because in a food web, arrows indicate the flow of energy from one organism to another, and in this case, the arrow goes from the mouse to the small bird, indicating that the bird preys on the mouse. Therefore, the correct answer is "tikus dan burung kecil" which translates to "mouse and small bird" in English.
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 pembungkukan ke depan atau melengkungnya tulang belakang ke arah depan. Kebiasaan menulis pada meja yang terlalu pendek dapat menyebabkan postur tubuh yang buruk dan mempengaruhi posisi tulang belakang, yang pada akhirnya dapat menyebabkan kifosis. Oleh karena itu, kifosis merupakan jawaban yang tepat untuk kelainan pada tulang akibat kebiasaan menulis pada meja yang terlalu pendek.
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 called mechanical digestion. This involves the physical action of chewing and grinding food into smaller pieces, making it easier to swallow and further digest in the digestive system.
32.
Perhatikan gambar paru-paru di bawah ini!
Bagian yang disebut bronkus ditandai oleh nomor ........
Correct Answer
C. 3
Explanation
Bronkus adalah saluran udara yang menghubungkan trakea dengan paru-paru. Pada gambar tersebut, nomor 3 menunjukkan bronkus, sehingga jawaban yang benar adalah 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. Ginjal is an excretory organ that filters blood and removes waste metabolites from the body in the form of urine. It plays a crucial role in maintaining the body's fluid balance, regulating electrolyte levels, and eliminating toxins. The other options, uretra, ureter, and hati, are not directly involved in the filtration and excretion of waste products.
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 order of the passage of impulses in normal movement is: receptor (alat indera) - syaraf sensoris - syaraf pusat - syaraf motoris - efektor (otot dan kelenjar).
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 refers to the adaptation of the body's organs and systems to the environment in order to ensure survival and optimal functioning. This type of adaptation involves changes in the physiological processes and functions of an organism's body to better suit the conditions of 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 answer states that whales often come to the surface of the ocean to breathe. This is a correct explanation of the behavior of whales. Whales are mammals and, unlike fish, they cannot extract oxygen from water through their gills. Instead, they have lungs and need to come to the surface to take in air. This behavior is necessary for their survival as it allows them to replenish their oxygen supply.
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
The statement "Belalang yang hidup di rumput berwarna hijau dapat bertahan hidup, sedangkan belalang yang berwarna kuning akan punah dimakan oleh pemangsanya" is a clear example of natural selection. It shows that the green-colored grasshoppers are able to survive because their color provides them with camouflage, while the yellow-colored grasshoppers are more easily spotted and therefore eaten by predators. Similarly, the statement "Kupu-kupu Biston betularia yang hidup di Inggris setelah revolusi industri lebih banyak berwarna hitam karena polusi asap menyamarkan pandangan pemangsanya" also demonstrates natural selection, as the black-colored butterflies are better able to blend in with the polluted environment and avoid being seen by predators.
38.
Pada gambar bunga di atas, bagian yang berfungsi sebagai alat kelamin jantan adalahnomor .......
Correct Answer
B. 2
Explanation
In the given image of a flower, the part labeled as number 2 serves 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 efforts mentioned in options 1, 3, and 5 are all related to intensification in agriculture. Pemberantasan hama dan penyakit (eradication of pests and diseases) aims to increase crop productivity by controlling and preventing the damage caused by pests and diseases. Pemupukan (fertilization) involves adding nutrients to the soil to enhance plant growth and increase yields. Teknik tumpang sari (intercropping) is a method where different crops are grown together in the same field, maximizing land use and increasing overall productivity. Therefore, options 1, 3, and 5 are the correct choices for intensification efforts in agriculture.
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 yield 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.