1.
Gaya terdiri dari tarikan dan ....
Correct Answer
D. Dorongan
Explanation
The question is asking for the missing term that completes the phrase "Gaya terdiri dari tarikan dan...". The correct answer is "Dorongan" because it is the term that completes the phrase logically. "Gaya" can be translated as "force" in English, and "tarikan" means "pull". So, it is logical to say that "force" consists of "pull" and "push" or "dorongan" in Indonesian. Therefore, "Dorongan" is the correct answer.
2.
Kaca yang jatuh bisa menjadi pecah. Hal itu menunjukkan bahwa gaya dapat ....
Correct Answer
B. Mengubah bentuk benda
Explanation
When a glass falls, it can break. This shows that force can change the shape of an object.
3.
Benda yang tidak dapat ditarik atau digerakkan oleh magnet disebut benda ....
Correct Answer
B. Nonmagnetik
Explanation
The correct answer is "nonmagnetik" because it is the Indonesian term for "nonmagnetic." Nonmagnetic objects are those that cannot be attracted or moved by a magnet.
4.
Berikut merupakan kerugian adanya gaya gesek, kecuali ....
Correct Answer
D. Benda menjadi licin
Explanation
The given options describe the disadvantages of friction. The first option states that friction slows down the motion of objects, which is a disadvantage. The second option states that friction erodes the surface of objects, which is also a disadvantage. The third option states that friction increases energy consumption, which is another disadvantage. However, the fourth option states that friction makes objects slippery, which is not a disadvantage but rather an advantage in certain situations. Therefore, the correct answer is "benda menjadi licin" (objects becoming slippery) because it does not describe a disadvantage of friction.
5.
Berikut adalah cara-cara membuat magnet, kecuali ....
Correct Answer
D. Dipanaskan
Explanation
The given options list various methods of creating a magnet. However, the option "dipanaskan" (heating) is not a method of creating a magnet. The process of heating an object does not generate a magnetic field or align its particles in a way that creates magnetism. Therefore, heating is not a valid method for creating a magnet.
6.
Contoh pengungkit jenis satu adalah ....
Correct Answer
B. Gunting dan tang
Explanation
A lever is a simple machine that consists of a rigid bar or beam that is free to rotate around a fixed point called the fulcrum. In this case, the fulcrum would be the point where the scissors (gunting) and the pliers (tang) pivot. Both the scissors and the pliers have a handle (the effort arm) and a cutting edge or gripping surface (the load arm). When force is applied to the handles, the load arm either cuts or grips the object, depending on the tool. Therefore, the combination of scissors (gunting) and pliers (tang) represents a lever of type one.
7.
Contoh penggunaan bidang miring dalam kehidupan sehari-hari adalah ....
Correct Answer
B. Memindahkan pohon ke dalam truk dengan menggunakan papan
Explanation
The correct answer is "memindahkan pohon ke dalam truk dengan menggunakan papan". This is because using a slanted surface or ramp (papan) can make it easier to move heavy objects, such as a tree, onto a truck. The inclined plane reduces the amount of force required to lift the object vertically, making the task more manageable.
8.
Katrol yang tidak berubah posisinya saat memindahkan benda disebut katrol ....
Correct Answer
D. Tetap
Explanation
Katrol yang tidak berubah posisinya saat memindahkan benda disebut katrol tetap. Pada katrol tetap, tali atau rantai yang digunakan untuk memindahkan benda hanya bergerak melalui katrol tersebut, tetapi katrol itu sendiri tidak bergerak dari tempatnya.
9.
Contoh penggunaan roda berporos adalah ....
Correct Answer
B. Sepeda dan mobil
Explanation
The correct answer is "sepeda dan mobil". This is because both sepeda (bicycle) and mobil (car) use wheels with axles (poros) to rotate and move.
10.
Berikut adalah sifat-sifat yang dimiliki oleh cahaya, kecuali ....
Correct Answer
D. Merambat berbalik
Explanation
The given answer, "merambat berbalik," is not a characteristic of light. Light does not propagate or travel in a backward direction. Instead, light travels in a straight line, can be reflected, and can be refracted or bent when passing through different mediums. Therefore, "merambat berbalik" does not belong in the list of characteristics possessed by light.
11.
Sinar matahari dapat masuk ke ruangan melalui lubang. Hal itu menandakan bahwa cahaya ....
Correct Answer
A. Merambat lurus
Explanation
The given correct answer is "merambat lurus." This is because the statement mentions that sunlight can enter a room through a hole, indicating that light travels in a straight line.
12.
Bayangan yang dihasilkan oleh cermin cembung adalah ....
Correct Answer
A. Semu, tegak, diperkecil
Explanation
The correct answer is "semu, tegak, diperkecil." When an object is reflected in a concave mirror, the image formed is virtual (semu), upright (tegak), and smaller in size (diperkecil) than the actual object.
13.
Mikroskop digunakan untuk melihat ....
Correct Answer
B. Benda-benda yang ukurannya sangat kecil
Explanation
Mikroskop digunakan untuk melihat benda-benda yang ukurannya sangat kecil. Mikroskop memungkinkan kita untuk melihat detail-detail kecil yang tidak dapat dilihat dengan mata telanjang, seperti sel-sel, mikroorganisme, atau partikel-partikel kecil lainnya. Dengan menggunakan mikroskop, kita dapat memperbesar gambar dari benda-benda kecil ini sehingga dapat dilihat dengan jelas dan dipelajari lebih lanjut.
14.
Contoh penggunaan cermin cekung adalah pada alat ....
Correct Answer
C. Senter
Explanation
Cermin cekung digunakan pada senter.
15.
Lensa yang dekat ke mata pada mikroskop disebut ....
Correct Answer
C. Lensa okuler
Explanation
The correct answer is "lensa okuler". In a microscope, the lens that is closest to the eye is called the eyepiece lens or the ocular lens. This lens is responsible for magnifying the image produced by the objective lens and allowing the viewer to see the enlarged image. Therefore, the term "lensa okuler" accurately describes the lens that is near the eye in a microscope.
16.
Lapisan terluar bumi kita adalah ....
Correct Answer
A. Kerak bumi
Explanation
The correct answer is "kerak bumi" because the outermost layer of the Earth is called the crust or the Earth's crust, and it is made up of solid rocks. This layer is relatively thin compared to the other layers of the Earth, such as the mantle and the core. The crust is divided into two types: the continental crust, which forms the land masses, and the oceanic crust, which forms the ocean floors.
17.
Lapisan atmosfer bumi terdiri atas ....
Correct Answer
B. Gas-gas
Explanation
The correct answer is "gas-gas" because the Earth's atmosphere is primarily composed of different gases such as nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. These gases are held in place by the Earth's gravity and play a crucial role in maintaining the climate, weather patterns, and supporting life on Earth.
18.
Batuan yang terbentuk dari pembekuan lava atau magma disebut ....
Correct Answer
A. Batuan beku
Explanation
The correct answer is "batuan beku". This is because batuan beku refers to rocks that are formed from the solidification of lava or magma. This process involves the cooling and hardening of the molten material, resulting in the formation of igneous rocks.
19.
Contohnya batuan beku dalam atau intrusi adalah ....
Correct Answer
A. Batu apung dan batu granit
Explanation
The correct answer is batu apung dan batu granit.
20.
Batuan yang mengendap di atas permukaan bumi disebut ....
Correct Answer
B. Batuan beku luar
Explanation
The correct answer is "batuan beku luar." This is because "batuan beku luar" refers to igneous rocks that have solidified on the Earth's surface. Igneous rocks are formed from the cooling and solidification of magma or lava. So, the term "batuan beku luar" accurately describes the type of rock that is deposited on the Earth's surface.
21.
Bumi tersusun atas tiga lapisan yaitu ....
Correct Answer
B. Kerak bumi, mantel bumi dan inti bumi
Explanation
The correct answer is "kerak bumi, mantel bumi, dan inti bumi." This is because the Earth is composed of three main layers: the crust (kerak bumi), the mantle (mantel bumi), and the core (inti bumi). The crust is the outermost layer and is made up of solid rock. The mantle is the middle layer and is composed of semi-solid rock. The core is the innermost layer and is made up of a solid inner core and a liquid outer core. These three layers together make up the structure of the Earth.
22.
Berikut yang bukan tindakan penghematan air adalah ....
Correct Answer
A. Mencuci motor setiap hari
Explanation
Mencuci motor setiap hari is not a water-saving action because washing a motor every day requires a significant amount of water.
23.
Gempa yang terjadi karena letusan gunung berapi adalah ....
Correct Answer
D. Gempa vulkanik
Explanation
Gempa vulkanik terjadi karena letusan gunung berapi. Ketika magma dari dalam bumi naik ke permukaan melalui saluran vulkanik, tekanan yang dihasilkan dapat menyebabkan retakan pada lapisan batuan di sekitarnya. Letusan gunung berapi ini kemudian menyebabkan guncangan dan getaran yang disebut gempa vulkanik. Gempa vulkanik umumnya terjadi di daerah aktif secara vulkanik dan seringkali disertai dengan aktivitas vulkanik lainnya seperti erupsi dan pelepasan gas.
24.
Jenis tanah yang banyak menyusun daerah-daerah pantai adalah ....
Correct Answer
D. Tanah pasir
Explanation
Tanah pasir banyak menyusun daerah-daerah pantai karena pasir memiliki sifat yang mudah tererosi oleh air dan angin. Hal ini membuat pasir mudah terbawa oleh arus air dan ombak pantai, sehingga banyak terdapat di daerah pantai. Selain itu, pasir juga memiliki drainase yang baik, sehingga air dapat dengan mudah meresap ke dalam tanah pasir dan tidak menggenang di permukaan tanah.
25.
Kegiatan manusia yang tidak mengubah permukaan bumi adalah ....
Correct Answer
C. Membersihkan sungai
Explanation
Cleaning the river does not change the surface of the earth as it involves removing waste and pollutants from the water, but does not involve altering the physical structure of the land. Building houses, constructing reservoirs, and mining all involve changing the surface of the earth by either constructing or extracting materials.